Avan Jogia is a Canadian actor, author and director who spent his teen years in the spotlight as one of the stars of the hit Nickelodeon series “Victorious.” Now, Avan’s new book of poetry, “Autopsy (of an Ex-Teen Heartthrob),” takes a critical look at the culture of celebrity and the sinister side of fame. Avan tells Tom Power about how starring on a Nickelodeon show felt like he was “performing adolescence and purity,” what he thinks about the documentary “Quiet on Set,” and why he’s chosen poetry to reflect on his time as a teen star.