star-studded i-dos. ♪ your game is tired. you should retire ♪ >>> then, is katy perry's new song slamming taylor swift? >>> then, inside celine dion's new rehearsal. is she tired of singing her greatest hits? >> sometimes i'me lik ugh. >>> then, spiders. >> oh, boy. >> snakes. with a little help from bindi irwin. can cam overcome his fears. >> help, help, help. oh, god. >> now, for may 19th, 2017, this is "entertainment tonight." >> will prince harry and his gal megan steal the bride and groom's thunder on their big day. that is not going to be easy because >> pippa's wedding will be spectacular. she may not be a royal, but she's definitely getting married like one. >> we're in england for all the last minute prep. what's happening, jen? >> it's just one day before the big wedding, but kate's little sister pippa held the rehearsal, here at st. mark's church.