R&B star BRUNO MARS has secured the U.S. Christmas number one - Locked Out Of Heaven has scored a second week atop the Billboard Hot 100.

The singer holds off competition from Rihanna, whose Diamonds shine bright at two, while the Lumineers' Ho Hey takes third place.

Ke$ha's controversially-titled Die Young manages to remain in the top five, slipping one spot to four, despite being taken off radio playlists across America following the Connecticut elementary school shooting last week (14Dec12).

Maroon 5 rounds out the new countdown in fifth place with former chart-topper One More Night.