The Jonas Brothers surprised President Barack Obama's daughters during a White House treasure hunt.

The pop act - comprising siblings Joe, Kevin and Nick - hid behind a door for Malia, 10, and Sasha, seven, to discover at the end of their search around their new home on Tuesday night.

The sisters - who were allowed to have the following day off school after their father was sworn in as US President - enjoyed an evening of their favourite movies, including "Bolt" starring Miley Cyrus and "High School Musical 3" featuring Zac Efron, before their favourite band made an appearance.

White House staff organised the hunt to show the girls around the famous Presidential house and teach them some of the history surrounding the building. A similar event was arranged for former president Bill Clinton's daughter Chelsea.

This is not the first time Malia and Sasha have been treated to an audience with the Jonas Brothers.

The band performed live for the girls and their mother Michelle - as well as 14,000 screaming fans - at the Kids Inaugural concert on Monday.

(China Daily/Agencies January 23, 2009)