Alas, Pittsburg mash-up artist Girl Talk (Gregg Gillis) is not booked again in Chicago this New Year's Eve -- though they're close: Dec. 31 at the Rave/Eagles Club in Milwaukee (just $20 on Amtrak...). They at least released a DVD a while ago of their triumphant NYE show here on 12/31/09.

Since then, Girl Talk last month released "All Day" -- download it for free here! -- a mind-boggling album constructed entirely of sampled music, lyrics and raps from other artists. Each Girl Talk mix has become less frenetic than the last, and this one's a blast to listen to, whether you work out the identity of each sample or not. Sometimes just sitting back and letting it all roll over you. General Public turns into Jay-Z turns into ELO turns into Busta Rhymes ... Ice Cube turns into Devo turns into Lil Wayne turns into Joe Jackson ... you see the see-sawing nature of Gillis' primary sources. Small wonder it took him more than two years to assemble this.

Need a map for all the samples on "All Day"? Fast Company drew one for you (a portion is pictured above) here.