If there was any question about this year's "Song of Summer," Robin Thicke has put that to rest this week, as the singer's "Blurred Lines," featuring Pharrell and T.I., ties Macklemore and Ryan Lewis' "Thrift Shop," featuring Wanz, with six weeks at No. 1. Meanwhile, JAY Z and Justin Timberlake's "Holy Grail" debuts at No. 8, making it a short climb to top, should the song move in that direction (which is likely).

As we previously reported, JAY Z's Magna Carta Holy Grail debuts this week at No. 1 (his 13th chart-topper). The new set sold 527,000 copies, in addition to one million downloads via the Samsung Galaxy app.

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