Usher and Chilli back together?

R&B hunk Usher and his ex-girlfriend Rozonda 'Chilli' Thomas, are reportedly back together after spending time together in Las Vegas, Nevada.

According to America's In Touch magazine, the couple were spotted kissing and cuddling backstage after Usher's show at the Mandalay Bay Hotel and then spent the following day shopping for jewellery.

The couple split because Usher was too candid on his smash-hit Confessions album, and single mum Thomas has reportedly been dating American footballer Ray Lewis.

Usher is being coy about the romance - when asked on a recent Oprah show if he was dating anyone, the hunk shyly said: "I'm single."

But onlookers in Vegas would beg to differ. One says: "They (Usher and Chilli) are in love."