"I am fully committed to 'Hannah Montana.' It's what gave me this amazing opportunity to reach out to so many people," the 15-year-old pop star and actress told People magazine. "I couldn't do it alone. We have an amazing cast that is so supportive, including my dad (Billy Ray Cyrus) who has been there for me every step of the way."

Rumors claiming Miley and her father have been showing up late to work and deliberately trying to get fired were swirling during the weekend. One report said Miley and her co-star Emily Osment had a falling-out due to Miley's allegedly unprofessional behavior.

"It's a lot of craziness," a source close to Miley told People. "Miley is really devoted to the show and she's really upset by the gossip. Miley is never late to work. Every minute of her day is planned out. When she's not shooting the movie or the series, she's recording the ('Hannah Montana') soundtrack. She has a lot invested in 'Hannah Montana.' It's not going away any time soon. ... Emily and Miley are like sisters. Occasionally they have disagreements but they make up and they never let it affect their work."

Production on the third season of "Hannah Montana" is under way.