Walk off the Earth, The Wanted Explode

SOME INTERESTING SALES UPDATES: Canadian band Walk Off the Earth, who have the hit YouTube cover of Gotye's "Somebody That I Used to Know," sold more than 17,000 singles this week, while the original hit version logged another 42,000, its biggest week to date. Also, Mercury/ IDJ act The Wanted's single, "Glad You Came," jumped from 6,000 to 22,000 in sales, and was the Most Added record at Top 40 after last week's appearance on Ellen. Justin Bieber manager Scooter Braun is handling the Irish boy band in the U.S. (1/18p)