DJ Earworm

This guy is amazeballs.
I don't know, and frankly don't care, how everyone else feels about mash-ups, but DJ Earworm is the absolute best at them. Each year, he mashes up, as in mixes together, in a way of sorts, the top songs of every year. You've probably heard at least one, because all the radio stations play them New Years Day without announcing his name or the name of the song, letting him and his amazing work drift away into nothingness.
And that is not cool.
If it weren't impressive enough that he puts 10+ songs together seamlessly, lyrics and all, there are also videos that transition from one another without a hitch. I don't know if he creates these, too, but all the same they are amazing.

My personal favorite is 2009's Blame it on the Pop, found on his annually updated web-album United State of Pop.
The mashup includes 25 songs.

• "Boom Boom Pow" - The Black Eyed Peas
• "Poker Face" - Lady Gaga
• "Just Dance" - Lady Gaga feat. Colby O'Donis
• "I Gotta Feeling" - The Black Eyed Peas
• "Love Story" - Taylor Swift
• "Right Round" - Flo Rida feat. Kesha
• "I'm Yours" - Jason Mraz
• "Single Ladies (Put a Ring on It)" - Beyoncé
• "Heartless" - Kanye West
• "Gives You Hell" - All-American Rejects
• "You Belong with Me" - Taylor Swift
• "Dead and Gone" - T.I. feat. Justin Timberlake
• "You Found Me" - The Fray
• "Use Somebody" - Kings of Leon
• "Knock You Down" - Keri Hilson feat. Kanye West and Ne-Yo
• "Blame It" - Jamie Foxx feat. T-Pain
• "I Know You Want Me (Calle Ocho)" - Pitbull
• "Live Your Life" - T.I. feat. Rihanna
• "Kiss Me Thru the Phone" - Soulja Boy Tell 'Em feat. Sammie
• "Down" - Jay Sean feat. Lil Wayne
• "The Climb" - Miley Cyrus
• "Best I Ever Had" - Drake
• "My Life Would Suck Without You" - Kelly Clarkson
• "Halo" - Beyoncé
• "Hot n Cold" - Katy Perry

Seriously, I recommend you go listen to it, and all of his other stuff. To put Kanye, Miley, Taylor and Soulja Boy in a song together and still make it sound good is a mad talent. I'm looking forward to big things from DJ Earworm. 

Here's a link to his website.

(Also, random trivia, he went to U of I and is from Evanston! He's homegrown, you guys. Super cool.)