NOW THAT'S WHAT I CALL MUSIC, VOL. 51

As long as there are catchy new songs climbing the pop charts, long-tenured compilation series Now That's What I Call Music! will be there each year to collect and curate them. Showcasing singles from early 2014, Vol. 51 of the American edition of this popular British series offers upbeat tracks like Katy Perry's "Birthday" and Ariana Grande's "Problem," alongside ballads like Sam Smith's soulful "Stay with Me" and A Great Big World's tender "Already Home." ~ Timothy Monger

• Genre: V/A Compilations
• Format: CD
• Released: 08/05/2014