I recently made 3 sampled instrumentals as well as a lyrical cover for all 3.  These include Billy Joel's Uptown Girl located here: https://www.youtube.com/watch?v=Vw089Y8lZfY, Colbie Caillat's Realize located here: https://www.youtube.com/watch?v=dBzUwkHuPoU, and P!nk and Nate Ruess's Just Give me a Reason located here: https://www.youtube.com/watch?v=nKYfzfcNz_c.  I got the main melody from Billy Joel's tune and it was a little tough to work with at first.  The high end was pushing through the mix to hard, so I used a high pass filter to turn the sample into something more workable.  I also included sub bass from FL Studio and the plugin called 3XOSC.  The drum fill has a couple samples at the end of the final bar, and it definitely has a hyped feel.  I was always inspired by Realize by Colbie Caillat, and I loved the line, "Didn't I, Didn't I tell you?" when the guitar plucks along.  I got that sample along with chopping the end of the outro into 4 pieces.  The P!nk and Nate Ruess song came out pretty cool because of the clear piano sound mixed with sub bass from Reason.  The drum kit is part of GlobalHeatWave.com and was an MPC kit.  There is a interesting hi hat pattern, snare hit, and open hi hat included in the drum pattern.  In addition to these remixed instrumentals, I put lyrics to every one of them.  I used the lyrics "uptown girl" a lot in the Billy Joel Lyrical version here: https://www.youtube.com/watch?v=Z1z8VAA8Rmk.  The Colbie Caillat lyrical version is here: https://www.youtube.com/watch?v=cWersZemt3o, and the P!nk and Nate Ruess lyrical version is here: https://www.youtube.com/watch?v=KJzYai2PvBI.  The P!nk song was particularly fun to write lyrics to and the hook was fun to work with as well.