The bathtub Whitney Houston died in held the secret to the singer's beautiful skin -- Harvey's totally on board ... and it could change your life ... Plus, Ryan Seacrest calls in -- detailing his absurd Valentine's Day outfit ... including a harp, a bow and arrow, and a GONG?!?! And Bobby Flay's last-minute V-Day recipes to save your evening -- developed especially for hot chicks ... and fat dudes ...