Just Wait & See is a mashup of Brancaccio & Aisher - It's Gonna Be... (A Lovely Day) and Bob Sinclar - I Feel For You.

Samples

It uses the instrumental from I Feel For You and the vocals from It's Gonna Be...

It's Gonna Be also samples S.O.U.L. S.Y.S.T.E.M - It's Gonna Be a Lovely Day.