. ♪ >> we were behind the scenes as a the capella group pentatonix performed live as the bride arrivedost it. >> the same one mariah used four years ago with 30 cameras all around the park, the brand-new tv event took four months and 500 people to plan. >> they got married seven years ago. it was a rush, he got called to serve our country in iraq and now eric is back and he watonts give his bride the most special wedding. >> husband an wife. we had a once in a lifetime experience. i think is going to be hard to beat. >> giant finale, a giant waterworks in front of the >> earlier we told you about la did gaga and bradley cooper shooting a star is born. when it comes to shooting movies what you see isn't what you if necessarily get. this is bradley cooper is at greek theater and this is his look-alike double. bradley plays an alcoholic over the hill singer in the story. it looks like his double has that scruffy look down. when dwayne johnson needs a stunt double he keeps it in the family. >> you're crazy. >> got a great stunt double, he's my cousin. he's running around here somewhere and