October 27, 2010 9:42 pm Rihanna Explains Why She Missed Katy Perry's Wedding Rihanna talks about her new album and explains why she missed friend Katy Perry‘s wedding. For more exclusive videos go to ExtraTV.com US & World Videos 2:03 Does Shakira still believe in love following Gerard Piqué split? 1:36 O.J. Simpson's cause of death revealed 25:57 WATCH: ‘Changing Climate' highlights the Philly-area residents who are combatting climate change 2:36 Super dad makes Mario-themed obstacle course for son's birthday 4:17 How the Philadelphia Union became the sustainability champs of the MLS