After being introduced to world in The Jonas Brothers movie Camp Rock, Demi Lovato has become one of Disney Channel's biggest stars. She's released a ton of million-selling records, appeared as a judge on The X-Factor, and was chosen to sing the promotional version of Let it Go from Frozen. 2014 sees her setting out on her biggest tour yet, performing all her biggest hits, such as Heart Attack, Skyscraper and Get Back.

Demi will be supported on her tour by Christina Perri and MTKO. Perri, who burst onto the music scene in 2010 with the mammoth hit Jar of Hearts, released her second album album of piano-driven balladry, entitled Head or Heart, earlier this year. MKTO are a duo of former Nickelodeon stars, Malcolm Kelley and Tony Oller, whose infectious pop rap single Classic went platinum.