Justin's new girlfriend is actually someone very familiar to him ... former 'Young and the Restless' costar Sofia Pernas. Justin played Adam Newman on the soap opera from 2014 until 2016. And, get this ... Sofia joined the show in 2015 to play Justin's TV GF, Marisa Sierras. But, here's what's also interesting ... Chrishell Stause was also on the show in 2016. Awk.