Some of your favorite Pro dancers will be returning to the ballroom for Len's Side-by-Side Challenge this week. Tune in to see Maks Chmerkovskiy, Tristan MacManus, Tony Dovolani, Chelsie Hightower, Anna Trebunskaya and more!

Len's Side-by-Side Challenge

Each performance this week will begin with a "Pro Masterclass." Two professional dancers will perform the first 30 seconds of the routine. Then, the Pro couple will be joined by the DWTS couple, and they'll share the dance floor for 15 seconds. The two couples will be compared side by side, performing the same choreography. Then, for the remaining 1 minute, 15 seconds, the DWTS couple will be alone on the floor dancing.

The couples will perform the following dances:

 Ingo & Kym - Cha Cha

Jacoby & Karina - Jive

Victor & Lindsay - Viennese Waltz

Alexandra & Mark - Samba

Sean & Peta - Quickstep

Kellie & Derek - Foxtrot

D.L. & Cheryl - Tango

Zendaya & Valentin - Argentine Tango

Andy & Sharna - Paso Doble

Tuesday night's Results Show will feature Selena Gomez, performing her new single "Come & Get It," and The Band Perry playing "Better Dig Two." There will also be a performance by Estonian singer-songwriter Kerli, singing "Love Me Or Leave Me."

Credit: http://beta.abc.go.com/shows/dancing-with-the-stars/blogs/Breaking-News/dwts-s16-week-5