I used to listen to mash-ups a lot, but got over it pretty fast. Mash-ups are cool every now and them, but a lot of them are NOT made very well.
HOWEVER! I found one the other day that is SERIOUSLY worth mentioning. Most Mash-ups take hit songs and squeeze them together to make a… not as good song. Well, this Mash-up takes a bunch of shit songs and makes one REALLY good one.
Its by a DJ who goes by 5 & a Dime. the song is called Fuck The Haters. Here is a youtube link:
Also, 5&aDime gives away all his music. This is the only song of his that I am familiar with, so I cant vouch for the rest of his music. Here is a link to his site so you can get some free jams