Britney Spears' Rehab Romance... With Howie Day?

Last month, we reported that Britney Spears was getting some lovin' in rehab from a rocker named Jason Filyaw. The random dude, who sings in a band called RIVA, confirmed a relationship with Spears before promptly dropping off the face of the planet.

Now, it's looking like Britney Spears may have sparked up yet a different rehab rebound romance while in the detox facility... also with a musician.

Howie Day.

The newly detoxed Spears met Howie Day while at Promises, and according to Life & Style, "fell hard" for the troubled singer-songwriter while in the facility, so hard that she's bringing him to a family wedding in June. 

Britney Spears "just lights up" when she talks about Howie Day and apparently thinks he's "the best kisser ever," according to the magazine.

Still, Brit's mama, Lynne Spears, isn't so stoked about Brit's new man because of his troubled past. He's been arrested - once for locking a fan in his tour bus bathroom and another time for verbally abusing an airline crew while drunk.

A class act, no doubt. But then again, he follows the likes of Kevin Federline, Isaac Cohen, Columbus Short and J.R. Rotem, so at least the bar is set low.

In other Britney news, she stepped out in Beverly Hills last night to help little sister Jamie Lynn Spears ring in her 16th birthday. Brit wore a tight, see-through top with a stain and no bra underneath (see picture above).

Britney's always one for both tact and terrific fashion sense.