David Archuleta gives a thumbs-up with former costar and good pal Jennette McCurdy backstage at his Pomona, Calif., concert earlier this month.

The 18-year-old American Idol alum updated his MySpace about his surprise guests. He wrote, “So this last week we had our Pomona, California show. It was our closest show to LA, and I saw a lot of familiar faces in the crowd! I also had some friends come to the show. Jason (Castro) came with some of his family! It was awesome to see all of them and I’m glad they were able to come. Jennette McCurdy (Sam on iCarly) also came! It was fun just hanging out with all of them backstage after the show. So I hope you guys had a fun time! Thanks for coming to the show! (Idk if either of you even read this but whatever haha.)

“Jason’s been working on a lot of original material right now and Jennette has a new single out right now called ‘So Close.’ So if you want… you should check it out! We also had some GREEAAT shows after that. We had Reno, Idaho Falls, and Boise shows. These were some of my favorite shows to do! And the crowds were all awesome! Thanks you guys sooo much for coming out! I’ve been getting more and more into the shows every night.”