Nicky Hilton sizzles in VERY racy pink sequin cut-out dress

Nicky Hilton and mom Kathy arrived to Paris Hilton and Carter Reum's wedding carnival

Nicky Hilton is a doting Matron of Honor in custom Alice + Olivia dress at Paris Hilton's wedding

Nicky Hilton makes a glamorous exit from sister Paris' lavish wedding to fiancé Carter Reum