On Twitter I keep seeing fans post about #DumbBlondeTeaser and stuff about a Dumb Blonde MV, but I know Avril hasn't posted anything on social media. So is it just a fan made video? Someone clarify please.
I was thinking the same. If it was official surely someone on here would have known about it by now. It’ll be a fan made video like you say.
Even if it was official, it wouldn't make any sense for her to release it now.
ETA: Based on a quick look at the tweets using that hashtag, it appears some fans decided to have a streaming week or streaming day for Dumb Blonde because it didn't perform as well as expected. Some fans might have put together a "fan made" music video to encourage streaming of the song I guess. The teasers that were used were all footage from other projects Avril has done (like the Maxim 2010 shoot), so it's very clearly a fan made thing.