By Clover Hope
NEW YORK (Billboard) - Beyonce's "Check On It" featuring Slim Thug led the US pop singles chart for a second week, but the big star was Disney's "High School Musical" TV soundtrack, which spawned several historic chart debuts.
"Breaking Free," sung by "High School Musical" actors Zac Efron and Vanessa Anne Hudgens, recorded the biggest one-week jump ever on the Billboard 100, rocketing 82 places to No. 4, thanks solely to digital downloads; the song garnered no radio airplay. "Breaking Free," not surprisingly, leapt 56 places to No. 1 on the Hot Digital Songs chart, sending "Check on It" to No. 2.