Lady GaGa has found an unlikely new superfan and mentor in R&B superstar Janet Jackson.
The Nasty hitmaker admits she's hooked on the colourful pop star's music - and was thrilled to discover the Bar Romance hitmaker is a "sweetheart".
Jackson tells MTV, "I really love GaGa and she's a sweetheart. It's not always the case when you meet them (superstars). You can enjoy their work, but it's not always so pleasant when you get to know their personality, and she truly is a sweetheart.
"She's definitely doing something different and I love that."
But Jackson admits she worries about the Poker Face singer after GaGa confessed to passing out three times during her a concert in New Zealand last month (Mar10).
Jackson says, "She works so hard and I told her I think she needs to slow down just a little bit, take some time out for herself."
Jackson's advice comes a week after OneRepublic frontman Ryan Tedder warned his pop pal to "be careful" not to burn herself out.
GaGa blamed the health concern on a lack of sleep, saying, "I was so jetlagged, I got in the night before and the jetlag just really caught up with me. I passed out about three times on stage that night but I got myself to the floor.
"I'd rather die on stage than walk off the stage because I was going to pass out... It's never happened to me before, I was just really tired."