How did Bruno Mars become Billboard's Artist of the Year? He grabbed hold of the album and single charts and never let go. Next uP: Super Bowl, Grammys and more of his Moonshine Jungle world tour.

Following Gaga's Mayhem, neither artist has yet to reveal any plans for a new album. READ ALSO: Bruno Mars, Lady Gaga pay tribute to wildfire resilience with classic 'California Dreamin' Stay ...

Lady Gaga recently lauded Bruno Mars as a uniquely talented artist, reminiscing about their Grammy-winning collaboration, ‘Die with a Smile.’ Gaga, celebrating her new album ‘Mayhem ...