Bruno Mars, Lady Gaga

But the reality is often subtler than that—career-wise, each superstar needed something from the other. Often, one act is a ...
Nearly five months after the 38-year-old pop superstar teamed up with Bruno Mars for "Die with a Smile," the romantic ballad reached No. 1 on the Billboard Hot 100 on Jan. 6 — and Mother Monster took ...
A source tells Rolling Stone that she's planning to reveal details about the project at the end of the countdown ...