A house/dance song, with a bit of piano?!

This is difficult to explain, but i heard a house/dance song, which has no lyrics, hence instruments only, it starts of slow with a beat,then the beat sort of stops and piano keys kick in,n the beat drops properly with the same piano keys or few keys r repeated throughout the song, with the house/dance music, this tune is in my head always n i dont have a clue on who sung it or what its called, HELLLP PLZWww@Enter-QA@Com

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