Complex sentence: In 2013, the same year in which he appeared on "Out" magazine's "Out100" list of prominent LGBT people, he also appeared on "Instinct" magazine's cover as one of its "Leading Men".
Split into simpler sentences: In 2013, he appeared on "Out" magazine's "Out100" list of prominent LGBT people. He also appeared in 2013 on "Instinct" magazine's cover as one of its "Leading Men".