Is there a Twitter client that will exclude retweets?

One of the friends I follow on twitter retweets almost everything her favorite celebrity tweets. This celebrity happens to tweet a LOT. As such, I’m constantly being told various crap I don’t care about. Normally, I would just unfollow, but she’s one of my closest friends, and then I also couldn’t see all the stuff about her personal life. Is there a Twitter client that will mark all retweets as spam or something? Maybe this twitter client would also mark certain hashtags as spam?