Game of Hearts — M.C. King

Series Description:
Miley Stewart looks like a regular girl-next-door, but when the lights go down, Miley is teen pop sensation Hannah Montana! Off stage, Miley wants her life to be as normal as possible, so only a few people know the truth about her dual identity. But keeping that secret is harder than Miley ever thought it would be. 

Hannah Montana #14: Game of Hearts 
When Lucas asks Lilly to be his girlfriend, Miley is so excited for her best friend! But when Lilly starts spending all of her free time with Lucas, Miley feels left out. To make matters worse, when Miley tells Lilly she caught Lucas kissing another girl, Lilly doesn't even believe her! Miley decides that it's time for Hannah Montana to teach Lucas a lesson so she can have her best friend back again. Will her plan work, or will Miley lose Lilly forever? Plus, will Lilly's girly makeover be a hit with her super-secret crush Matt?