This one is interesting, but I have the feeling that I need to explain.
In the late 70's and early 80's, women's wrestling or joshi puroresu was HUGE in Japan, and instrumental in that popularity were the Beauty Pair. The team consisted of Jackie Sato and the above Maki Ueda. Here is a a bit of a historical package on their career (Japanese).
Much of their popularity stemmed from the fact that they sung their own theme music, which became a tradition for many in All Japan Women Pro-Wrestling (AJW). Here is a clip of them performing this very song on TV (Japanese):
As the "Pair" were so popular, it would be a no-brainer to have one of them sing a song that is essentially an advertisement for a video game, especially a huge one like Space Invaders. As I earlier touched on this particular game's popularity in these here United States, I feel it is also important to mention that this game was also hugely popular in its home country of Japan as well.
What is YOUR favorite celebrity participation or endorsement of a video game???
Chris "Sledge" Douglas' home away from home! Prixel Derp is a catch-all blog of sorts talking about retro-gaming and computing, as well as related items, such as news clips, magazines, etc.