“Okay, it’s official,” I wrote to Maura midday on Thursday, when Billboard released the new Hot 100. “I have seriously underestimated ‘Whatever You Like.’”

That durable smash by Atlanta rap deity T.I. moves into the penthouse for the third time since late August. Directly behind it is T.I.’s simultaneous hit, the Rihanna duet “Live Your Life,” which moves up to No. 2 two weeks after it spent a sole week in the top spot.

After I bravely predicted a few weeks ago that the irresistible “Life” would dominate the fall and make “Whatever” a distant memory, the T-and-Ri pairing has had a hard time holding onto the top spot. Last week’s coup by Britney Spears’s well-hyped “Womanizer” was pretty predictable. But the idea that T.I.’s new hit would also have to fight off his older one—a loping, sluggish song that’s neither a ballad nor a club jam—was a development few saw coming, least of all me.

If there’s one thing it shows, it’s that for all our talk here in recent weeks about the dominance of digital sales on the charts these days, airplay still matters. “Whatever” wouldn’t still be competing for the top slot without radio’s fervent support.

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