Demi Lovato performs at Sir Philip Green's British Street Party to celebrate the Opening of TOPSHOP and TOPMAN at The Grove on Thursday, Feb. 14, 2013 in Los Angeles. (Photo by Todd ... more 
Demi Lovato performs at Sir Philip Green's British Street Party to celebrate the Opening of TOPSHOP and TOPMAN at The Grove on Thursday, Feb. 14, 2013 in Los Angeles. (Photo by Todd Williamson/Invision/AP) less 
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Associated Press
Fri, Feb 15, 2013 12:16 AM EST