LOS ANGELES — Think of Britney Spears' new single, "Hold It Against Me," as an updated version of the hard-soft dynamic employed by Nirvana. Instead of remaking rock by marrying punk's crashing chaos to invitingly Beatlesque melodies, Spears — or really, her billion-dollar producing duo, Max Martin and Dr. Luke — sustains her career on the cutting edge of dance-pop by blending the near-industrial beats and breakdowns of English grime music with a beatifically insipid chorus worthy of Martin's recently minted star, Taio Cruz."Hold It Against Me" hardly offers the most original come-on. The Bellamy Brothers, in fact, recorded a 1979 hit centered on the same phrase (based on an old Groucho Marx quip, "If I said you had a beautiful body, would you hold it against me?"), and the gentler elements of the Spears single have a similar soft-rock tinge. But Spears further proves her spiritual affinity for fellow trash icon Axl Rose when she turns the phrase "a little hazy" into a tiny heavy-metal explosion. And then there are the breaks that come late in the track, which, in this particular effort, offer the promise of something more.Finally trading in gloss for sonic adventure in the song's last few seconds, Martin and Dr. Luke slice and dice Spears' incitements ("Drop it like a hood," she sneers) into a rapidly shifting mix of dry-ice synth lines and ammunition beats. Everything jumps. "Hold It Against Me" briefly transforms from the kind of pop smoothie whose inevitable omnipresence will soon make us want to vomit into a hit that actually could take the charts somewhere new.But that part lasts just a couple of moments.