While originally suspicious of any e-mail tip regarding a “Three-Minute Shower Challenge” event, we were happy to read on and learn that the one taking place this afternoon will be both child-friendly and teeming with smoothies. Masturbation jokes aside, it’s Earth day tomorrow, which means that you should start celebrating today. And you can do so from 11:30 to 2:30 pm in Lerner C555, where the Body Shop is hosting an “Earth Day and Earth Lovers Three-Minute Shower Challenge” celebration. Apparently, that new female character on Gossip Girl is one of the hosts. The flier (at right) also boasts free smoothies, “giveaways,” and a DJ.