On this episode of 'When I Was 17,' we take a look back on the teenage years of Ludacris, Jillian Michaels and Pete Wentz. Whether he was sneaking into concerts or trying to release his demo, rapper Ludacris didn't take no for an answer. Although she considered herself a loner in high school, fitness trainer Jillian Michaels found freedom in the form of big guns. In Chicago, Fall Out Boy member Pete Wentz traded in his soccer ball for a bass guitar when he was 17.