Fergie shaking on and off stage. "Raw and Melting"

Its great to see Fergie in this rare footage when she just joined The Black Eyed Peas. Here she really is "Raw" At the beginning of the video clip you can see Justin Timberlake on stage. Can anyone tell me what is sticking out of his back pocket? I tried to upload the video, but you can go to www.kronick.tv and watch it there, its on the home page