Complex sentence: The song is an up-tempo, piano-led dance song with a distinct and easily recognizable opening drum and then piano riff and is written in 4/4 and in the key of D-flat major.
Split into simpler sentences: The song is an up-tempo, piano-led dance song with a distinct and easily recognizable opening drum and then piano riff. It is written in 4/4 and in the key of D-flat major.