Shawn Mendes, the Lonely, Uncertain Pop Heartthrob

On “Wonder,” an album of largely bland pop-rock, the 22-year-old sings about the solitude of stardom.On “Wonder,” an album of largely bland pop-rock, the 22-year-old sings about the solitude of stardom.Read MorePop and Rock Music, Mendes, Shawn, Wonder (Album)