Kelly Osbourne is struggling to keep up with her fellow contestants on TV's Dancing With The Stars, admitting the training is "way harder" than she had imagined.

The rock offspring-turned-reality TV star is competing on the ballroom dance show against celebrities like pop star Aaron Carter and R&B singer Mya.

However, Osbourne confesses she's finding it difficult to keep up with the complicated footwork she has to learn every week.

She tells MTV.com, "It is way harder than I thought it'd be. I thought with each week it would get easier, but it doesn't, because each week you're learning a new dance with new steps. I'm nervous about the pace. I'm nervous that I'll forget steps, because you only do have five (or) four days to learn, so it gets tough."

Nevertheless, Osbourne insists she has no regrets about signing up for the show: "It's the most fun I've ever had working on a show. It doesn't feel like work."

Osbourne was forced to dance through the pain earlier this month after suffering an adverse reaction to a body spray.

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(This news article provided by World Entertainment News Network)