Personalized Stays At My Birthday Party Men's V-Neck T-Shirt. Funny birthday Men's V-Neck T-Shirt - Red with Las Vegas parody, party hat and balloons, says WHAT HAPPENS AT MY BIRTHDAY PARTY STAYS AT MY BIRTHDAY PARTY! 4.7 oz., 100% pre-shrunk cotton Narrow, set-in 1x1 mitered V-neck collar Shoulder-to-shoulder taping Double-needle stitched sleeves and bottom hem