She said: "I don't think there's anything wrong with partying, partying is
healthy. You can't have a boring life. You have to party some time.
"People put so much energy into being negative about Britney. There's so
much pressure on her - it can't be easy."
Although she is worried about the pressures of fame, Rihanna isn't concerned
about having a high-profile relationship.
The sexy star is currently dating actor Josh Hartnett and admits she is
smitten with him.
She said: "I would be lying if I said we were just good friends. I have so
fallen for him - he is lovely.
"He's so hot and he's really sweet to me. When we hang out, it feels right,
even though it's pretty new."