For instance if you look at Gwen's "Wind It Up".. it screams Lady Gaga
The imagery, the fashion, the gimmicks
and the overall feel of the video showcase's what Gaga was
during her "The Fame/Monster" era's 
and it doesn't stop there, the imagery of the video describes what Gaga is today
this video at times gives you hints of "Just Dance" "Poker Face" "Judas" and "Bad Romance"