Think all those performances on Dancing with the Stars are arranged by the professional dancers, like Cheryl Burke? Think again, according to a new report.

Spies say that many of the DWTS routines are arranged by outside choreographers, especially when it comes to the "younger, less experienced" professional dancers, like Burke, Kym Johnson, Derek Hough, and his sister Julianne.

The show makes it appear as if the professional partners create all the moves for the celeb contestants - but that's just not the case.

All that rehearsal video can be a little deceptive.

One source says that "Cheryl Burke is the worst" when it comes to arranging her own material on Dancing With the Stars and "relies heavily on outside help."

Dancing With the Stars' Cristian de la Fuente and Cheryl Burke.

There are also reports that one of the professional choreographers - Wendy Johnson - worked on the dance that won Drew Lachey the title.

For the record, Cheryl Burke's rep says that any insinuation that she gets outside help is a blatant lie, adding that Wendy Johnson is actually a very good friend of Cheryl's - she's known her since she was 11 or 12-years-old.

Also, the rep says, Cheryl Burke "spends Tuesday night choreographing her routines in her apartment." In any case, an ABC source says it's not against the rules for the dancers to use outside help, so it doesn't really matter. Just interesting.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.