ON THE NAIL: Betsey Johnson’s long been known for over-the-top style and an unrestrained use of color — and next month, that will extend to nails as well. Johnson is teaming up with Sephora by OPI to create a limited edition nail lineup which includes seven full-size shades ($9.50 each); a $24.50 set that includes six shades, three of which are exclusive to the kit), and $12 nail tip designs that include skulls and lips. Hues range from silver glitter to turquoise, but Johnson is particularly fond of It’s My Pink, a hot-pink lacquer scented with her new Too Too fragrance. “The collection is just how I like it — loud, outrageous, pretty, pinky and kick-ass rock and roll,” said Johnson.