Rihanna's friends are worried she is partying too much.

The "Stay" singer - who is currently on her Diamonds world tour - has reportedly been going out a lot since ending her relationship with her on/off boyfriend Chris Brown recently because she is heartbroken that he is spending time with his ex-girlfriend Karrueche Tran again.

"Pals have told Rihanna not to get upset about Chris and Karrueche. They think the best revenge would be living well and looking good, but so far Rihanna's answer has been to party the pain away. It's understandable that she'd want to escape her feelings on this but she's taking it way too far. Everyone around her wants her to get some help -- they're genuinely worried about her. She's not in a good place and looks like she's self-destructing. Her friends are really worried about her and think she needs to take time out to detox and refocus," a source close to the 25-year-old star said.

Rihanna's father Ronald Fenty recently said he thinks she will reunite with the 24-year-old 'Fine China' singer in the future: "I'm still his [Chris Brown's] no.1 fan - I still like Chris regardless. They have a very passionate relationship but if they split up it does not mean it's forever with them. In a couple of months, they'll be back together. She [Rihanna] seemed to be doing OK. We talked about how the tour was going, I asked her if she partied and she needed rest and she said, 'I'm going to be OK, dad.'"