Answer:

opi

AnswerCrossword Clue
OPINail polish brand with a Katy Perry collection
OPINail polish company since 1981
OPINail polish brand with a color called "Do You Lilac It?"
OPINail polish brand with a color called Lincoln Park After Dark
OPINail polish brand with a color called Vampsterdam
OPIPopular brand of nail polish
OPIBrand of nail polish
OPIBig name in nail polish
OPINail polish brand
OPINail polish brand with a Bubble Bath shade
OPINail polish brand with the colors Teal the Cows Come Home and Berry Fairy Fun