Britney Spears Joins Madonna on Stage

So much for a big Britney Spears-Justin Timberlake reunion.

Both pop stars converged at the much-hyped Madonna concert last night, although they did not appear with her at the same time, much to fans' chagrin.

Spears, clad in black pants, a white tuxedo-style shirt and sexy black heels, shared the spotlight with Madonna on "Human Nature." But Madonna's one-time makeout partner split long before Timberlake appeared to duet on Madonna's "4 Minutes."

Surrounded by bodyguards, Britney Spears immediately took off following Timberlake's appearance. Here's a brief look at Britney and Madonna: