Rihanna Back With Chris Brown After Mysterious Tweet?

Rihanna has sparked rumours that she is back with her former boyfriend Chris Brown – by dropping hints that he is cheating on his girlfriend with her.

The singer is said to have been left angered after Brown was seen kissing model Karrueche Tran at a Las Vegas party.

Rihanna tweeted: "How can you lie to her, while u lay with me???"

She later added: Is this LOVE? Is that what it is?....I cud be dreaming or just plain crazy!!!

Rihanna split from Brown in 2009 after he assaulted her during a fight. The singer was sentenced to five years' probation and six months of community service.

A source told The Sun: ''Despite everything that has happened RiRi has not stopped loving Chris," a source said. "They have been in constant contact for some time and things seemed to be stepping up a gear in recent weeks.''

"Many thought these public declarations of love on Twitter were paving the way for an official reconciliation. She has been warned by pals not to get involved in such a destructive relationship again but she just can't let go."