James Morrison Feat. Jessie J - Up (Live At The 2011 Jingle Bell Ball)

Watch Jessie J perform 'Up' live with James Morrison as she headlines the 2011 Jingle Bell Ball's Sunday show.

'Price Tag' superstar and Jingle Bell Ball headliner Jessie J performed live at the second of the 2011 shows. Watch the footage of her perform James Morrison hit 'Up' on stage below.

The musician made a surprise appearance alongside the 'Who You Are' star on a version of their recent hit single, which proved hugely popular with fans at the O2 Arena in London.

You can also see pictures of Jessie J at the 2011 Jingle Bell Ball as well as the full Jingle Bell Ball Sunday set-list and full highlights of the #JBB Sunday show.

Watch more Jessie J Jingle Bell Ball performances here.

More at www.jessiejofficial.com and www.jamesmorrisonmusic.com