It's rapper Lil Wayne, who's set to have the most massive first week of any new album this spring, by far.
How huge will it be? Tha Carter III just came out Tuesday morning, so it's difficult to tell from less than a day's worth of sales, but an exec at Lil Wayne's label estimates the disc will sell between 850,000 and 950,000 by the end of its first week. If their numbers are correct, that would be about double the opening figure for 2008's current record-holder, Mariah Carey's E=MC2, which opened with 443,000 copies.
All I can say is, damn.