David Archuleta was a special guest at the Del Taco Fast Food Restaurant in California on the same night of the Jingle Ball 2008. The restaurant was closed just for him, he actually ran the Drive-Thru lane, did a meet and greet and a live interview with KHOP 95.1
Source: Annyo84 IDF
But wait, we gotta show you some pictures to prove this event took place, LOL, Thanks to our friends at Snarky Archies for the news.
Source: KHOP (Lots more pictures there)