DiRT 2

the best way to make superstars like you is to race on the same race's as thay like but on (SAVAGE) or higher..

1).Go to the My Stuff option in the caravan.
2).Check out what race's each superstar likes.
3).Find the race you want to do to make the superstar like you.

NOTE: you may have to do the race a few times.
And it needs to say BUDDY/LEGEND on each racer for the achevement. So just keep checking up every once in a wile and you should have an extra 15g added to your gamercard in no time :)