A hits-and-run scene

During the genial R&B singer T-Pain's set at Screamfest '07 on Saturday at Gibson Amphitheatre, he recapped his recent guest verses on other artists' hit singles. First was his turn on R. Kelly's charming bachelor anthem "I'm a Flirt," then Huey's club staple "Pop Lock & Drop It," then the remix of Unk's "Two Step" and finally Chris Brown's "Kiss Kiss."

This came after Pain opened the set with his choruses from E-40's "U and Dat" and Plies' "Shawty," followed by his own slow-burning singles "Buy U a Drank (Shawty Snappin')" and "Bartender," which would be achingly familiar to anyone who's encountered an open car window all summer.

Indeed, T-Pain's set was little more than a reminder of how much time you've spent listening to him, whether you intended to or not. He remains a prime example of how to stay above water in a testy hip-hop market. Pain's equation: have an instantly recognizable timbre (for him, it's tweaked by a ubiquitous vocoder) and be omnivorous in genre and the artists you collaborate with.

That strategy made Lil' Wayne this year's most acclaimed MC, and it defined Screamfest headliner T.I.'s most recent album, the purposefully schizophrenic "T.I. vs. T.I.P." -- the latter being his supposed alter ego. The big lesson at Screamfest was that purism has no place at the top of the charts, and radio is certainly more interesting for it.

One of early 2007's most dominant sounds was spacious, minimalist electro-R&B, and Lloyd's "Get It Shawty" is a welcome late entry to that field. It's hard to imagine Lloyd having too many singles ascend like "Shawty" though, as the song's best asset is that it feels hypnotically depersonalized, which doesn't make for a lasting image.

Yung Joc's similarly quick set seemed more of an occasion for him to administer a particularly spirited lap dance and toss cash around a girl from the audience. It's a clichéd gesture, but it fit the mood of his jackhammer-repetitive breakout hit "It's Goin' Down."

And contrary to expectations, it seems Joc has another hit on his hands with the cheery "Coffee Shop," one of the better recent metaphors for the ever-popular rap topic of how much cocaine he's sold.

Another regrettably common gimmick of live hip-hop is for an artist to barely get through one verse and a chorus of any song before skipping off to the next one. For T-Pain though, it almost seemed necessary, given how many radio staples he needed to get around to.