He has covered many popular songs including “Firework” by Katy Perry, “Born This Way” by Lady Gaga, “Need You Now” by Lady Antebellum, “Moves Like Jagger” by Maroon 5, “Somebody That I Used to Know” by Gotye, “Some Nights” by Fun., “Brave” by Josh Groban, “Story of My Life” by One Direction, “Pompeii” by Bastille, and many more. He released his self-titled debut studio album in 2014. As part of On The Rocks Hollens was on the NBC reality television series The Sing-Off.