Rhianna wants Amy Winehouse to kick her alleged drug addiction and get her career back on track - so the soul star can join her on tour in the US.
Winehouse has been taking time out from her career after high-profile August spells in hospital and much tabloid coverage of her reported drug problems.
But the Umbrella hitmaker believes she will make a successful chart comeback, and can't wait for her return.
She says: "I'm worried about Amy. I want her to get better as I love her.
"There's not a doubt in my mind she can still be successful in America even though she's been linked to drugs.
"It'd be awesome to go on tour with her in the States. I'd love her to join me."