Complex sentence: In January of 2015, Entertainment Tonight reported that entertainer Justin Bieber became the newest underwear model for Calvin Klein and that he had credited Colker with recommending MYO-X, a dietary supplement, that Bieber had allegedly used in preparation for the photo shoot.
Split into simpler sentences: In January of 2015, ET reported that entertainer Justin Bieber became the newest underwear model for Calvin Klein. Bieber credited Colker with recommending MYO-X, a dietary supplement, that he allegedly used in preparation for the photo shoot.