Britney Spears Tour 'Intimidating' For Opener Jordin Sparks

'I could hear ... that they were excited and that I wasn't so out of place,' Sparks says of Britney fans' reactions to her.

It's been quite a busy summer for [artist id="2807016"]Jordin Sparks[/artist]. Right after wrapping up a stint opening for the [artist id="2088128"]Jonas Brothers[/artist], she hit the road with [artist id="501686"]Britney Spears[/artist] for her Circus tour — needless to say, it's been a whirlwind few weeks for the "American Idol" winner.

"It was a little intimidating, just because it's such a different crowd than the Jonas crowd," she told MTV News as she made her way over to Madison Square Garden for the her third night on Britney's tour. "And you go to a Britney concert and it's all of her fans and they have grown up ... but if they scream, they're screaming 'cause they want to. They don't scream at just anything, so when I took that stage and I could hear a little bit through that they were excited and that I wasn't so out of place, it was awesome."

Sparks only got the call to join Britney a couple of weeks ago, and even though she barely had time to rehearse, she couldn't say no. "The night before the Britney tour, we went into this ... little warehouse, drew a big circle of chalk and just tried to put some stuff together — and once we got on that stage it just sort of fell together," she said. "We still have some stuff to work on ... we walked off the stage like, 'We hope people liked it.' "

Sparks has yet to meet Britney or even catch her set, but hopes that will change as the busy tour continues.

"Well, I know they all have to get their hair and makeup done and there's dancer after dancer ... I haven't seen Britney yet, but I heard she's doing really well," Sparks said. "I haven't gotten to watch her show yet either. ... I've seen all the dancers and they've got cloaks on [so that people don't see what they're wearing] and they're just walking around everywhere."