Unisgned.com/Newgrounds.com music for our music video

I will need music to lip synch to in my video, but the music i will use will need to be non-copyright or music that i have produced myself or by a local band or famous artist who has given me permission to use their music. Most probably i will get music from non-copyright websites such as www.unsigned.com or www.newgrounds.com. I will search these websites to try and find a music video that will give me inspiration to make a video for. I will find a song that i feel i could lipsynch to so it will not be too fast, i will also find a song that i will enjoy and i feel will appeal to a certain audience.