Every spring, Allure magazine persuades a few brave ladies to take it all off for their nude issue, and this year we get to see “Entourage” babe Emmanuelle Chriqui in her birthday suit. Joining her are “American Idol” judge Kara DioGuardi, actress Regina Hall, Jessica Capshaw of “Grey’s Anatomy” and singer-songwriter Colbie Caillat. As usual, these shots show about as much skin as you’d see at your local beach or pool.