A girl going by the YouTube handle Applegirl002 has performed very accurate covers of Lady Gaga’s “Poker Face” and Beyoncé’s “Irreplaceable” solo using four iPhones. She set up the phones in her living room, pointed a video camera at the rig, and performed.
For “Irreplaceable,” (currently at 885,920 views) she just used three iPhones, but she started the four-phone “Poker Face” video (1,167,000 views) by demonstrating which apps she was using and how she was using them to put together the composition. One iPhone — the one oriented like a microphone — was running the I Am T-Pain [iTunes link] Auto-Tune app. Two were running the BeatMaker [iTunes link] looping app an the other was running an unspecified analog synthesizer app.
There have been other musical iPhone performances in the past, often using Smule’s Ocarina app — for example, the Stanford iPhone orchestra. This girl has made herself a YouTube star within just a couple weeks, though. Her performances are already among the most popular iPhone music videos. Don’t be surprised if she puts out another one for her fans soon.