Noted lip-syncing troupe SketchShe is once against testing the bounds of what can be considered comedy with a very dark PSA they made with other noted Australian all-female sketch team Skit Box. Presumably their videos of three pretty women lip-syncing in a car have encouraged more and more amateurs to do it, especially since SketchShe's stuff tends to go very viral. 

An important message for the online community...Featuring SketchShe... #BadBloodLipSync

Posted by Skit Box on Sunday, October 11, 2015
Sources: Skit Box