DigiTech JamMan Stereo Looper and Phrase Sampler
If you need a powerful, flexible looper that allows you to easily switch between sampled phrases and doesn't cost a fortune, the DigiTech JamMan Stereo is the looper you've been looking for.
The JamMan Stereo has four footswitches that allow the user to quickly access different loops during live performance. Prerecord tracks for verse, bridge and chorus of a song and then switch the loops in time with the music during performance! For an example of how the JamMan Stereo works in practice, check out this YouTube video: