(Cover) - EN Showbiz - Taylor Swift was overwhelmed when T.I. agreed to perform with her at "ridiculously" short notice.

The country musician has been on her Speak Now World Tour since February. To keep things fresh a number of other stars have joined her on stage, including Usher and Justin Bieber.

Rapper T.I. performed with her earlier this month, and Taylor still can't believe he agreed to duet on Live Your Life in Atlanta.

"Well, I called T.I. the night before the show, so I felt like it's such short notice that [he wouldn't do it with me], and he's just like, 'Hey, yeah, sure,'" she explained. "And it was just amazing. I was so excited 'cause I'm such a fan and I thought, 'This is such short notice, this is so ridiculous,' that I'm asking him to do this the night before. And he's like, 'I'll be there.' And he showed up for sound check and we were all just so star-struck."

Taylor, 21, has also featured guest spots by Nicki Minaj and B.o.B during her tour. She's always dreamt of working with such artists as she's been listening to rap music since she was a little girl.

"I'm a huge hip-hop fan, and it's been so amazing to have so many incredible artists come out and to get to sing the hooks on their songs that I've been blasting in my car for the last couple years," she told MTV News. "It's been awesome. I couldn't have asked for more amazing special guests on this tour, and we're not finished yet." (C) Cover Media