London: Singer Rihanna is throwing tantrums to get her ex-boyfriend Chris Brown back. Rihanna is leaving no stone unturned to let brown split from his existing girlfriend.

"Not only has she initiated a Twitter conversation with Chris for all to see, but she has gone to see him," a source told.

"She stopped by his studio recently - twice. She's also calling and texting him a lot. She won't let go.

She's trying to break up Chris and his girlfriend, Karrueche (Tran). Chris is happy, but Rihanna keeps playing her games to make trouble.

It's become an issue," the source added. Brown, in the past, was told to maintain distance from the singer following a savage attack on her back in February 2009, but the restraining order against him was relaxed in 2010.