Carrie Underwood admits she is ''O.C.D.'' about certain things.

The 'Two Black Cadillacs' singer has a hectic touring and recording schedule and admits she gets fussy about being in control of certain aspects of her life, likening it to Obsessive Compulsive Disorder (O.C.D.).

Demi Lovato will duet with Fifth Harmony in the 'X Factor' USA final - because she ''didn't have anything else to do''.

Show chief Simon Cowell - who is the group's mentor -joked it was ''irritating'' to have his fellow judge work with his act, but felt it best she had something to occupy her time because she has no contestants left in the competition.

Kristen Bell and Toby Keith will host this year's CMT Music Awards.

The 'House of Lies' actress and the 'Made in America' singer will present the annual ceremony, which takes place in Nashville, Tennesse on June 6.