Chart Beat

In honor of the legendary diva's birthday, we've ranked the biggest songs of her inimitable six-decade-long career.

The song becomes his sixth No. 1 on the radio airplay tally, pulling him even with Bruno Mars for the most leaders among males.

Country icon George Strait is heading for a No. 2 debut on the Billboard 200 chart next week with his new album, "Love Is Everything." Meanwhile, Demi Lovato's fourth studio effort, "Demi," is aiming for a No. 3 bow. According to industry sources, the albums are projected to sell about 120,000 and 110,000, respectively, by the end of the tracking week on Sunday, May 19.

Each Friday, Billboard presents "Bubbling Under," a weekly look at new and noteworthy acts making their way toward Billboard chart success. Up this week: Passenger, A Great Big World, Dakota Bradley and Chrystian

Two artists make 10-position jumps straight into the top 10 on the Social 50 this week, as both Demi Lovato and Avril Lavigne return to the region.