A collection of 10 essential ballads by artist Sara Bareilles.

A collection of 10 essential ballads by artist Usher.

A collection of 10 essential ballads by artist Christina Aguilera.

A collection of 10 essential ballads by artist Kelly Clarkson.

A collection of 10 essential ballads by artist Lady Gaga.

A collection of 10 essential ballads by artist Katy Perry.

A collection of 10 essential uptempo/driving songs by artist Adele.

A collection of 10 essential ballads by artist Bruno Mars.

A collection of 10 essential ballads by artist Beyoncé.

A collection of 10 essential uptempo/driving songs by artist Christina Aguilera.