Lady Gaga and Bruno Mars’ collaborative hit Die With a Smile reached No. 1 on the Billboard Hot 100 on Monday, January 6, prompting the former singer to react to its success on social media.

Bruno Mars is teaming up with Sexyy Red for a fun new single, and it seems like he's including his recent collaborators in ...

Lady Gaga is gearing up to kick off a new chapter ... like “Judas,” “You and I,” and the title track, which hit No. 1 in a number of territories.