DuncXCourt: 7 Hot N Cold Things (is a mashup you can find on YouTube here: http://www.youtube.com/watch?v=trSxos_8-ao and both songs fit that couple, in fact at the beginning of the thread someone said that 7T fits with them, and also Youtuber YangstRocks did a HnC video of DxC)
TrentXGwen: still don't know, lots of dongs fit with them
GeoffXBridg : also lots of songs fit with em