Jordin Sparks routines are so energetic they leave her "drenched" with sweat. The "Battlefield" singer - who shot to fame after winning U.S. TV talent show "American Idol" in 2007 - credits her support slot on The Jonas Brothers' tour for helping her lose weight.

She explained: "I'm literally drenched every night when I get off the set because the stage for this world tour I'm on is so massive. I'm constantly moving."

Jordin Sparks has a stalker. The "Battlefield" singer - who won U.S. TV talent show "American Idol" in 2007 - revealed she started getting strange phone messages after one of her friends posted her number on the internet as a joke.

She explained to Sony Ericsson's Pocket TV: "I had the same cell phone number since seventh grade up to last summer, so a lot of people had my number. Somebody thought it would be funny to post it on MySpace. Loads of people got my number, and I had this person texting me going, 'I know this is you.

Fans of the teenage band the Jonas Brothers purchased a whooping 800,000 tickets for their upcoming world tour. In response to the demand, the group immediately rolled out second shows in Los Angeles, Chicago and Philadelphia, as well as Vancouver, British Columbia.

The boy band has sold-out arena shows in major cities including New York, Los Angeles, Chicago, Philadelphia, Washington D.C., Houston, Pittsburgh, Edmonton, New Orleans and Atlanta.