Usher

Usher is taking action against his ex-wife and her recent allegations about the singer.

In late November, Tameka Raymond filed papers in a Georgia court that asked a judge to award her custody of the former couple's two children on grounds that Usher reneged on multiple promises he made to her. For example, he supposedly canceled Tameka's Saks 5th Avenue credit card.

The gall of this man, we know.

But now Usher has fired a legal shot of his own, denying all accusations in newly filed court documents and requesting that a judge to throw out his ex's request for full custody of the two kids they currently share.

He has also refused to take a drug test, despite Tameka's repeated attempts to force the issue.

A trial date has been set for February 27.

[Photos: WENN.com]

Tameka Foster is intent on proving that Usher is an unfit father.

The singer's ex-wife filed papers in court last week that allege a number of indiscretions by Usher, most of them based on the way he has treated Tameka, not the way he has been toward his two sons.

But now Foster is raising the accusatory ante, demanding a judge force Usher to take a drug test ASAP because she believes he's been popping pills around the pair's children. Usher has refused to take this bait so far, deeming his ex's claims to be "frivolous and unfounded," merely meant to "harass and embarrass" the artist.

As a result, lawyers are now involved and Tameka's side is urging the legal system to act quickly, lest Usher have the chance to "cleanse" his body of all foreign substances.

We'll see how this turns out, but right now it's clear Usher did the right thing by cleaning his life of Tameka, isn't it?

Let's face it: this is Justin Bieber's world. We merely live in it.

The superstar has been everywhere this holiday season, and not solely because some moron named Mariah Yeater sued him for paternity of her son. Bieber has released a Christmas CD and has spent weeks promoting it via talk shows, live performances and official video releases. The latest example of the latter? This duet with Mariah Carey.

So it's only appropriate that Bieber - along with friends Usher and Busta Rhymes - was featured on last night's tree lighting ceremony at Rockefeller Center in New York City. Watch the teenage icon do his thing in the following two performance videos:

Justin Bieber and Usher at Rockefeller Christmas Tree Lighting

Justin Bieber and Busta Rhymes - Drummer Boy (Live)

Tameka Foster is not seeking to strip Usher of custody of the former couple's two children. At least not according to a Tweet by the singer's ex-wife.

A day after TMZ published court documents that outlined a number of complaints Tameka has issued concerning Usher's treatment of her  - while printing a headline that paraphrases Tameka as saying Usher does not "deserve" their kids - Foster took to Twitter and ranted:

"Yeah... Great way to wake up huh? Some bs. Ppl have no idea about how crazy & deep this all is. The headline is a lie, also its negative because it only tells a morsel. Nothing but lies really sickening!"

Among other problems with her ex, Tameka says Usher has failed to comply with previous agreements that require him to ask her permission before hiring a nanny; allow her time with their sons during the summer and during Christmas; and that he must give her the option of caring for the children during any extended time away.

So, what is the truth? Tameka has not said any more and, at the moment, all we have are legal papers on one side versus a 140-character-or-less statement on the other side.

If Tameka truly wants to clear her name, she may want to get off Twitter and get into a courtroom.

[Photo: WENN.com]

The ex-wife of Usher is determined to make this anything but a happy holiday season for the ab-tastic artist.

Tameka Raymond - who split from the singer in June 2009 - has filed documents in a Georgia court that ask the judge to strip Usher of physical custody of the former couple's two children. On what grounds?

Based on legal papers obtained by TMZ, some that are possibly understandable... and others that are downright ridiculous. Tameka alleges:

• That Usher is obligated to get her approval prior to hiring nannies, but has failed to do so.
• That Usher must give her the option of watching the children when he's away for more than eight hours, but has not always done so.
• That Usher reneged on giving his ex custody of the kids for two weeks this past summer and during Christmas 2010.
• That Usher has failed to obtain permission for Tameka to travel outside the state with her children, as previously promised.
• That - we are not making this up - Usher canceled her Saks 5th Avenue credit card.

Overall, Tameka claims she is owed $34,000 in child support - and she's asking for even more per month going forward, due to a "substantial change in [Usher's] income." In other words: Usher has become even more of a success since he divorced his wife, and now she wants to reap the benefits of his hard work.

Even the Occupy Wall Street protestors would take exception to that argument.

[Photos: WENN.com]

Justin Bieber is in a giving mood.

The singer appeared this morning on The Today Show and hyped his best-selling Christmas album, "Under the Mistletoe," explaining that a portion of all proceeds are going toward charities that include Make-a-Wish, Medishare for Haiti, City of Hope and the Boys & Girls Clubs of America.

But the Biebs did a lot more than talk a good game: he sang a terrific one! Watch below as Justin takes to the stage with his mentor, Usher, and the pair duet on a holiday classic. Roast some chestnuts over an open fire with this talented duo now:

Justin Bieber & Usher - Chestnuts (Live)

** Programming note: Bieber will also appear on The Late Show with David Letterman tonight. Watch a snippet from that interview HERE!

We are one week away from the release of Justin Bieber's special shout-out to Christmas, as "Under the Mistletoe" comes out on November 1.

In anticipation of this event, the singer unveiled the official music video for his holiday original a few days ago - and now he's teamed up with Usher to present this duo's version of "Chestnuts Roasting on an Open Fire."

"This record is going to be remembered for years to come," Usher said on Ryan Seacrest's radio program today. "It's a record that has always been on of my favorites, and I'm happy that I was able to share it with Justin, and for us to put it out."

LISTEN BELOW!

Lady Gaga and Usher are among the music stars coming together to celebrate former President Bill Clinton and the 10th anniversary of his foundation this weekend.

Highlighting the 65-year-old's efforts to protect the environment, promote global health and stimulate the economy, the Decade of Difference concert honoring the Clinton Foundation will be held at the famed Hollywood Bowl.

The show will stream live on Yahoo at 7 p.m. EST Saturday.

Lady Gaga and others will honor the former President tomorrow.

Kenny Chesney, Juanes, K'Naan and XX are also on the bill for the one night only event, which will also feature an acoustic set by U2's The Edge and Bono.

We've already heard about what happened when Lady Gaga met President Obama. We can only hope she wears something like this tomorrow night as well.

[Photos: WENN.com]

We've warned you before, Taylor Swift fans: you really have no idea who might join this talented artist on stage when she plays a concert in your hometown.

In late August, Justin Bieber sang a duet with Taylor in Los Angeles, while Nicki Minaj did the honors one night later.

Over the weekend, meanwhile, Swift played a couple of shows in Atlanta - and was joined by a couple of that city's most beloved musical icons. First up, watch T Swizzle drop a serious beat alongside Usher during a live rendition of "Yeah!"

Taylor Swift & Usher - Yeah!

Justin Bieber has made it very clear: he'll be teaming up with mentor Usher for at least one song on his upcoming Christmas CD.

“just finished a late nt in the studio for the christmas album…it is OFFICIAL…my big bro @UsherRaymondIV is on the album with me! #EPIC (sic)” Justin Tweeted this week.

Let's just hope Justin can find time to lay down some songs in between his planning of amazing dates with Selena Gomez.

No release date has been announced for the album yet, but Billboard might as well save a spot at number-one for Justin some time this winter.

Other artists rumored to be collaborating with Bieber on it include The Band Perry, Boyz II Men, Taylor Swift and Sean Kingston.