The 19-year-old singer – who is rumoured to be dating 'Twilight' hunk Taylor Lautner, 17 – is terrified about fronting hit US comedy show 'Saturday Night Live' this weekend but can't wait for her stint in front of the camera.

She wrote on her Twitter page: "Starting the SNL process I kinda feel like I might have a heart attack or pass out in the pitch meeting. I'm that excited.(sic)"

Despite her fears, Taylor can't stop thinking about the show and admitted last week she is incredibly organised in her preparations for presenting the programme.

She said: "I try to prepare for everything beyond the extent of preparation. So I have all these ideas for skits. I'm probably gonna walk in there with 35 ideas."

The Grammy nominee recently claimed that she is concerned her clean-cut image disappoints some people.

She explained: "Sometimes people are fascinated by the fact that I don't care about partying, almost to the point where they think it's weird. I think when we get to the point where it's strange for you not to be stumbling around high on something at 19, it's a warped world." (c) BANG