Not sure, the message in the Xboxlive lobby just says earn double xp this weekend. Just keep prestiging and use the extra tokens for 2xp once they add 20th. It's really the only thing there is to do since you'll just lose your gold guns once they do add 20th.
No kidding. I have zero plans this weekend, so I intend on taking full advantage of this. I'm 8 lvl's away from 6th, and I'd like to get to 7th, maybe 8th this weekend.
