Maroon 5 have made US pop chart history after scoring the biggest jump to number one ever on the Billboard Hot 100. The group's Makes Me Wonder has shot up the chart from number 64 to number one, beating Kelly Clarkson's previous jump from 52 to the top spot. The record-breaking feat prevents Avril Lavigne from celebrating a second week on top of both the US album and singles charts; her Girlfriend hit drops a place to number two. Another former number one, Timbaland's Give It to Me, also falls a spot to number three, while R+B star Ne-Yo also enjoys a big chart boost, jumping from 39 to number five on the new chart with Because of You. Country star Carrie Underwood also makes chart history with her charity recording of The Pretenders' I'll Stand by You, which the singer performed to African schoolchildren as part of a touching video featured in the Idol Gives Back TV special last week (25Apr07). Debuting at number six on the new countdown, it's the first iTunes exclusive to ever open in the top 10.