If you watched this morning's presentation, this should be no surprise to you. If you missed it, here's a blurb from Nintendo's press release.

Even your far-fetched celebrity dreams can come true in Tomodachi Life. If you have ever wanted international superstar Christina Aguilera to join you in a sing-off, or believed that she would become BFFs with your cousin or wished she would perform a song with your customized lyrics, it could happen here. The multi award-winning singer has signed on to be a part of Nintendo’s promotional campaign for the game, and her Mii character will be available at launch. Aguilera’s Mii character also will guest star in a TV commercial and in online videos that show all the exciting things that happen when celebrities mingle with Miis players know personally. The first video in the series can be viewed here: http://youtu.be/sBTHSY5GKKY. Additional celebrities involved with Tomodachi Life will be announced over the upcoming weeks.

Now all you have to do is figure out what other celebrities will appear!