Ethnicity represented in the music industry

Last Friday Night - Katy Perry
In this music video, it stereotypes the ethnic group of white americans - in particular teenagers and young adults. It does this by showing numerous shots of people dancing and drinking (an example of this representation is at 1:18 of the video), this is confirming the stereotype and creating a negative representation of the ethnic group and age group. The representation of gender in this music video is also negative, this is because it shows the women as feeling that they need to be sexualised to be seen as attractive to the males (this is particularly shown at 3:05-3:08 in the video, when the woman - Katy Perry - is walking down the stairs after having a 'transformation' into her more sexualised form).

This ain't a scene, its an arms race - Fall Out Boy
In this music video, there is a group of black men who are with the rapper in the video (0:36). The stereotype in the video of these men is that they are violent and aggressive, this is shown at 1:23 when one of the band members accidentally knocks a alcoholic drink out of another's hand and the man then starts to lash out at him, starting a fight. The representation of the ethnic group in this music video is negative because it is showing them as aggressive and violent. This video also show the sexualisation of women (shown at 1:38) when they are in  room and the women are wearing revealing garments and later on (at 2:16) when they are in bikini's in a hot tub.