Favourite Billboard No. 1 Hits of 1984?

You can pick up to 3 choices.

My favourites are "Karma Chameleon", "Time After Time" and "Say Say Say". 

What are your favourites? 

Here are the other threads in this series:
IMDB2.freeforums.net/thread/35725/favourite-billboard-hot-100-1980
IMDB2.freeforums.net/thread/78144/favourite-billboard-1-hit-1981
IMDB2.freeforums.net/thread/78147/favourite-billboard-1-hits-1982
IMDB2.freeforums.net/thread/78148/favourite-billboard-1-hits-1983
IMDB2.freeforums.net/thread/78152/favourite-billboard-1-hits-1985
IMDB2.freeforums.net/thread/78153/favourite-billboard-1-hits-1986
IMDB2.freeforums.net/thread/78154/favourite-billboard-1-hits-1987
IMDB2.freeforums.net/thread/78157/favourite-billboard-1-hits-1988
IMDB2.freeforums.net/thread/78160/favourite-billboard-1-hits-1989