I keep hearing this song and I never remember the name to it. I found a vine which plays it. It's the second song. Any help?

If I worked out the right link, and the Vine you're talking about is called "Piano Thug", then the songs are:

Dr Dre ft Snoop Dogg - Still Dre

https://www.youtube.com/watch?v=_CL6n0FJZpk

1000 Miles by Vanessa Carlton

https://www.youtube.com/watch?v=PN5c_uHRKIk