Sources used:

Boot Cut Rockers - When Comes The Rain (Original)
Red Hot Chili Peppers - Californication (Acapella)
Outkast - Ms. Jackson (Acapella)
Lauryn Hill - Doo Wop (That Thing) (Acapella)

All my mashups are created for entertainment purposes only. They are non-profit and for promotional use only. No copyright infringement intended.