The Frozen soundtrack has returned to the top of the U.S. album chart to land a sixth week at number one.

The 2013 release, featuring songs by the animated film's stars Idina Menzel and Kristen Bell, becomes the first to sell over a million copies in 2014.

The album, which first hit the top spot on the Billboard 200 countdown in mid-January (14), becomes one of only four soundtracks that have scored six or more weeks at number one in the U.S. The last to spend more time at the top was the Titanic album, which notched up 16 weeks at number one in 1998.

Country music star Luke Bryan scores the week's highest debut on the U.S. albums chart with Spring Break 6... Like We Ain't Ever at two, while Rick Ross' Mastermind, which topped the countdown a week ago, slips to three.

Aloe Blacc's new release Lift Your Spirit and Pharrell Williams' G I R L round out the new top five.

Meanwhile, on America's singles chart, Williams' Oscar-nominated Despicable Me 2 tune Happy holds on to the top spot for a fourth week, while Katy Perry's Dark Horse and All of Me by John Legend round out the new top three, and newcomer Soko's viral hit We Might Be Dead by Tomorrow debuts at nine.