In case you didn't know, an 18-year-old who goes by AnDy Wu Musicland has made some of the best mashups of the year. Most recently, he made a VERY good mashup of Justin Bieber's "Love Yourself" and Selena Gomez's "Hands to Myself."
Listen to that here:
When you're done listening to that, then check out his mashup of "Sorry" and "Single Ladies."
AND FINALLY, you have to hear his year-end mashup of 98 songs. IMO, it's the absolute best year-end mashup so far!