Use any username you feel like, although it is probably best if you use a username you always user for other services so you can remember it.
@victoriajustice is her username.
Her instagram username is @chinamcclain
Taylor's instagram username is @taylorswift
A creative Instagram username for someone named Jay can be Jayboi or popularJay.
Taylor's instagram username is @taylorswift
Her official instagram username is @badgalriri
Taylor's instagram username is @taylorswift
Britney Spears doesn't have an Instagram account.
@acaciabrinley
@taylorswift
@greysonc97
Her username is badgalriri.