'American Idol' season 16, episode 6 recap and performances
American Idol/YouTube

"American Idol" season 16 kicked off the proper competition on Monday with footage from Hollywood Week, and there was a lot for music fans (and the judges) to take in. Katy Perry, Lionel Richie and Luke Bryan had to watch both solo performances and both performances from hastily assembled groups as they tried to decide which singers should be among this season's finalists. It wasn't easy with so much going on! Here are the highlights music fans need to see from Monday's episode:

1) A whole lot of Bieber going on

If you're a Justin Bieber fan, this episode of "American Idol" was for you. Not only one but two of the group performances featured a Bieber song, and making it more complicated was that it was the same song. Both groups performed "Love Yourself," which made it even harder for anyone to stand out. Someone who really struggled in the Bieber fever was Laine Hardy, who was partnered with three female vocalists in his group and was ill-suited for both the song and being in a group that just didn't fit him. Watch their performance by playing the video above, and watch the other Bieber group's cover here, but Laine probably would've done much better with a different song.

2) Catie Turner's hidden talent

Who expected Catie Turner to beatbox? That came as a total surprise after watching her audition, but that's exactly what she did in her group number, which you can watch by clicking the link above. She was equally impressive in her solo performance during the episode, so she could be a serious contender in "American Idol" season 16. She's a bit like Caroline Glaser when she was on "The Voice" in that everyone thought Caroline was cute and adorable, but didn't quite know what to expect from her and underestimated just how talented she was. Caroline then got even better as her "Voice" season went on and emerged as a breakout star, so can Catie do the same on "Idol"? Hopefully she will!

3) A familiar song (and more beatboxing)

Another one of the groups performed a song very familiar to Luke Bryan: "Want To Want Me," which Bryan performed as a duet with Jason Derulo both online in a viral video and in their episode of "CMT Crossroads." While the "Idol" group didn't hit the heights of Bryan and Derulo's performance, it was still fun to hear them do a song that he knows so well and loves. There was some impressive beatboxing here, too, and the true show-stopper was Ada Vox, who should be familiar to "Idol" fans. Ada previously appeared on the show during "American Idol" season 12 as Adam Sanders. Will the second time around have a better ending than the first? Based on this performance, it's a distinct possibility.

"American Idol" airs Sundays and Mondays at 8 p.m. on ABC. Fans can get tickets to see judge Katy Perry live on her 2018 tour now through AXS by using the links below:

June 10 - Stockholm, Sweden - Ericsson Globe/Stockholm Live (Click here for tickets)
June 14 - London, England - The O2 (Click here for tickets)
June 15 - London, England - The O2 (Click here for tickets)
June 18 - Birmingham, England - Arena Birmingham (Click here for tickets)
June 19 - Sheffield, England - FlyDSA Arena (Click here for tickets)
June 21 - Liverpool, England - Echo Arena Liverpool (Click here for tickets)
June 22 - Manchester, England - Manchester Arena (Click here for tickets)
June 24 - Glasgow, Scotland - The SSE Hydro (Click here for tickets)
June 25 - Newcastle upon Tyne, Scotland - Metro Radio Arena (Click here for tickets)