Come summertime, who wants to be bogged down with weighty issues? Not beauty companies, certainly, many of whom are combining transparency with bright colors in their summer launches. It’s a winning combination, to be sure, eye-catching at the counter and utterly covetable. Givenchy’s Gelée d’Interdit is a balmlike, wax-free gloss whose clear formula allows the pigments to take center stage, while celebrity manicurist Deborah Lippmann hit upon transparency to create the perfect yellow nail lacquer, a shade she swears is wearable by all thanks to its jelly finish. Originally scheduled to launch later this year, Lippmann moved its debut up aft er being besieged by requests when the color was worn by Lady Gaga at the Grammy Awards. And if the current crop of summer beauty products is any indication, it looks like Gaga’s not the only one with nothing to hide.