The final two crews dance to music from the upcoming concert film, Katy Perry: Part of Me, after meeting the pop starlet. Then, America's Best Dance Crew is crowned. The hour also features performances by past champions.

The top three crews compete for the two spots in the championship round by choreographing routines to the music of David Guetta, starting with a group number to "Titanium" featuring Sia.

The four remaining crews choreographed routines inspired by LMFAO, beginning with a group performance to "Live My Life" by Far East Movement featuring Justin Bieber. Redfoo from LMFAO handed out the dance challenges, and Season 3 champion Quest Crew visited the rehearsal studio to work with the crews.

The five remaining crews choreograph routines inspired by Rihanna. Unlike last season, where her choreographer handed out the challenges, Rihanna delivers them to the crews herself.

The five remaining crews began the episode with a dance number to "I Like: The Remix" featuring Enrique Iglesias and The WAV.s, alongside Season 6 runner-up ICONic Boyz. Then, each crew was given a country and an international dance style to incorporate into routines that were set to the music of Pitbull.

The six remaining crews paid tribute to J.Lo. Her own choreographer, Beau "Casper" Smart, worked with the crews during rehearsals. Each crew's challenge was to highlight a defining moment in J.Lo's career. Smart also gave them an additional challenge that linked to their initial challenge. Pauly D also made an appearance as a guest DJ.

The seven remaining crews choreograph routines inspired from songs by Drake.

The nine remaining crews choreograph routines inspired by Madonna's most iconic music videos.

Flo Rida performs; the crews must craft a routine to one of Flo Rida's hits.

The crews must incorporate Britney Spears hits into their first routines.