I don't think Pharrell is gonna get 17+ weeks. His airplay is already declining (he'll be near or below 100M AI by July - that's 2 1/2 months away) and so will his sales & streaming. He's peaked. The next month or so, he'll still be #1, but his lead will weaken. I think he has like a month left on top.
I'm hoping Sing really blows up in the next few weeks. It's kinda Pharrell replacing Pharrell, BUT
