Jordin Sparks Is Just As Amused By Jonas Brothers' Costumes As Fans

'They were like, 'Hey, go feel his grapes!' ' the JoBros' tourmate says of one of Joe Jonas' rehearsal getups.

[artist id="2807016"]Jordin Sparks[/artist] is just as amused by all those unusual [artist id="2088128"]Jonas Brothers[/artist] tour costumes as the rest of us. It's hard not to love seeing Joe Jonas dressed up as grapes while rehearsing during their big summer tour.

And Sparks, who is warming up for the brothers on the tour, can't really explain this new phenomenon.

"I have witnessed it, and I don't know where it came from," the season-six "American Idol" champ told MTV News. "[Joe] just started that maybe a couple days ago, a week ago. I think the first time, he's like, 'You got to check out my outfit; you gotta be sure you watch the soundcheck!' ... I was like, 'What are you doing?' "

Her favorite of the costumes — which has also included Joe and some of the band dressing as the three little pigs — is the grape costume, which led to quite an interesting misunderstanding.

"It was like he dressed up as the Fruit of the Loom grape, which was awesome," she said, adding, "I felt uncomfortable, because they were like, 'Hey, go feel his grapes!' I was like, 'Ah, no thanks!' "

But if you think she has some insider info on where the costumes come from because she's on tour with the JoBros, think again. "I have no idea," she said. "I want to know where he gets them, 'cause that grape costume was awesome."

Jordin's sophomore album, Battlefield, dropped Tuesday.