Many fans often ask how to personally get in touch with Christina Aguilera. Below we have listed (In order of most likely to be received/replied to) all the various ways to contact Christina herself.

Meet & Greet
If you get this amazing opportunity through charity auction or VIP at the next tour, do not pass up this amazing opportunity to hand deliver a letter, card or fanart to Christina. In most cases the Meet & Greet director/staff will ensure they get your fanmail to Christina's dressing room so that after the show she can look over the fan letters and gifts as she eats her dinner.

Twitter
https://twitter.com/#!/TheRealXtina
Christina has finally entered the century and obtained herself a twitter account. Although this method is not ideal for long letters, it is a great way to say a simple "Hello" or express in a sweet & short way your fandom or even share pictures of fan creations or collections of yours. Christina has already responded to several fan tweets sharing their personal dedication through creativity so although there is no guarentee Christina will see your tweet amongst the thousands being sent to her, its still better than nothing and she seems to be pretty active in the twitter world so far.

Christina Aguilera Official online Radio Station with iheartradio
Christina Aguilera has her own radio station at iheartradio.net and encourages fans to write in either to request a song or share a personal story or even ask questions. Once in awhile Christina checks in to her radio station and answers fanmail over the air or just gives updates on whats going on in her life at the moment. This is a great tool to get fanmail directly to Christina and possibly even get a reply.
Christina Aguilera Radio:
http://www.iheartradio.com/mediaplayer/?station=ICAG-FL&action=listenlive&stream_id=4469&channel_title=Christina%20Aguilera%20Radio

Email Christina: Christina@aperadio.com
Or Call the Radio Station to leave a voicemail for Christina: 1-866-686-1010. Your Message might be played on the air!

Christina Aguilera Official Myspace:http://www.myspace.com/christinaaguilera
Write Message, friend request, comment

Christina Aguilera Official Facebook:http://www.facebook.com/christinaaguilera
Write Message, Like, Post & Comment

Christina Aguilera Official Site:www.christinaaguilera.com
Christina has registered with online community although has yet to post. Christina does however use her Official page to leave messages for fans & keeps fans up to date on upcoming events, news and merchandise.

I wish she tweeted more...but I'm still happy she's on Twitter. Even though it's only for The Voice I'm sure.

Actually, she's tweeting more than I ever thought she would. I personally thought she was gonna post once and then wait months before she posted again.

Thanks for posting. I think i will write to her radio station address. hopefully she still checks it.

my teachers wife actually met xtina in a promotion for something

LOL @Christina has finally entered the century