Something Blue (The Guardian Agency #2)
Ursula Sinclair

River Blu’s music has made her the stuff of legend, she’s every bit a rock star who dominates the pop charts. But through the years a secret haunts her, making it impossible to give her heart to anyone or anything other than her music.
When River’s life is in danger she turns to Noah for help. They have a history together, one he’d like to repeat, with a different ending. But first he has to figure out who from her past is trying to kill her.