. >> the show is unentired by the elements, earth, wind, water, air and fire. >> you'll get a spritzy, that was the best dance show we've ever seen. so -- >> and speaking of the best. derek says he's not immune to a little stage fright. >> i was so nervous. i was best man at mark ballas' wedding and i was shaking and -- >> it was hands down the most beautiful thing i've ever heard. >> it sounds like he'll be a pro by the time jjlianne ties the knot. >> i hhve, like, lots of family members and they'll all be incorporated somehow. >> best man is, likee that's a tough field to get, you know what i mean? put best brother, hey, i'm your bro. >> yeah. that is. so i've got that one covered. >> that is the cheesiest thing i've ever heard. >> yeah, cheesy, but cute. >> i'm going to miss him on "dancing with the stars." guess what? you can catch him live on tour which kickssoff april 19th. >> still ahead, mark wahlberg takes us to his hometown. only he's with mark and his family. >> llonardo dicaprio on the death of his co-star alan thicke. >> he was really nice to me. >> and only "e.t." was i