“IT’S MY PARTY” DAY. THIS IS A REAL THING

Teen pop star Lesley Gore hit  #1 with “It’s My Party” in 1963, and they went ahead and made a “day” out of it. In honor of “It’s My Party Day,” we’ve dug out a few surf-themed party pix. That’s middle-school-age Kelly Slater, above, with Fall Guy actress Heather Thomas, holding it together about as…