Can 당신 belive this?

I do not watch how i met your mother, though i have seen it advertised and it looks funny. I would watch it, but when it's on i'm usually on my way back from work and miss it 의해 around 5-15 분 depending. I also do not own any of the wii games as i do not own a wii.
However - for your 질문 as to why the creators of just dance added this song in 질문 i would say that they have exhausted all what they term 'dance-able' songs and are now turning to something that has a half decent beat 당신 can tap your foot to and 그네, 스윙 your arms around in complicated movements.
Unfortunately dancing with a wii control and in a small available 우주 such as bedroom and living room doesn't really help with the adding of moves, and i often see moves repeated whilst watching my 프렌즈 play.
Also 당신 have to think about popularity of songs and the shows/artists they come from. Most dance and song games for any console are polled 의해 how many views a show has received, how many albums have been sold of a particular artist and what is 'in' at the moment with the 'young ones'.
Console games such as the wii dance games are targeted for teenage girls mostly and teenage girls listen to 리한나 and britney and what not so that's the songs they mostly play. They add a few extra to make it look good, put on an advertisement where groups of people of all ages are dancing and viola 당신 have sales.
It doesn't have to be good, as long as people buy it.

sorry... got NO clue!