Kelly Clarkson is not holding back!

The first American Idol winner just said that the only reason she continued to work with Dr. Luke was that her record label forced her to work with him. Yikes!

In a radio interview with Australia's KIIS FM on Monday, Kelly said, "the last time I worked with him I only worked with him because literally I got blackmailed by my label."

The pregnant singer, who worked with Luke on her 2004 hit single "Since U Been Gone" and in 2005 for the song, "Behind These Hazel Eyes," continued, "It was a really hard time for me. ... They were like, 'We will not put your label out if you don't do this'."

The big-voiced songstress said that she caved to the record label's demands because she knew her touring crew was financially dependent upon her.

Kelly added, "We have a whole crew to support...people that depend on us for their livelihood so sometimes you have to make decisions that you just have to swallow that pill."

The "Mr. Know It All" singer said that while she couldn't talk about what happened with Kesha, she could "remark on his character."

Kelly was quick to mention that nothing like what Kesha is claiming happened to her but the two did not get along -- "he never did anything like that [alleged sexual assault] to me." But Kelly did say, "We've clashed before... He's difficult to work with, he's kind of demeaning."

"Unfortunately when you have that poor a character that so many artists don't like you, that's not normal," she added.

Kelly also said, "Obviously he's a talented dude but he's lied a lot. ... Musically it's been really hard for me because he will just lie to people and it makes the artist look bad."

Looks like Kelly C ain't a fan of the doc!