LL is in the house! The last time we saw LL COOL J, the smoldering star of "NCIS: Los Angeles," Ellen dropped him into the lagoon at Universal Studios Orlando! He's all dried off and ready for more. Who knows what will happen in our Breast Cancer Awareness Month dunk tank?!

Then, funnyman JONAH HILL is here to tell Ellen the story behind his recent and dramatic weight loss. The "Superbad" star is also behind the brand new animated series, "Allen Gregory," which he both created and stars in, and is sure to be a laugh riot.

JASON DERULO is one of the hottest stars on the music scene, and he's here to perform not one, but two of his hits, "Don't Wanna Go Home" and "It Girl" from his CD, "Future History." It's a show the ladies will love this Tuesday!