Ashley Tisdale denies having more plastic surgery

High School Musical star Ashley Tisdale has blasted reports she has had more plastic surgery.

"People are saying I had another nose job and I did not. That's ridiculous," Tisdale, 22, tells People.com. "I was away in New Zealand filming a movie [They Came From Upstairs] and so people think I went away to have more work done. But I didn't."

The actress -- known for her role as 'Sharpay' in Disney's High Scool Musical franchise -- had a nose job last November to correct a deviated septum and to smooth out two bumps from when she fractured her nose as a teen. She later came under fire after saying she didn't have to change the look of her nose in order to fix her septum.

"[Tabloids] have doctors talk about what they think I did with my surgery, but they did not examine me," Tisdale says. "They don't know what I have inside my nose."

"It's very irresponsible for a medical professional to comment on someone whom they have not examined," notes Tisdale's rep, Scott Appel.

Rumors also recently surfaced that Tisdale, who is in Utah to film High School Musical 3 had a boob job.

"Look at me," she laughs. "Does it look like it to you? No! It's ridiculous. I'm not for plastic surgery. I'm not going to get another surgery. I can promise you that."