From the unconventional and awe-inspiring to the hilarious and heartwarming, here's a look at some of the most interesting photos, videos and stories that have our newsroom talking today. What's capturing your attention, filling your inbox and cluttering your Facebook/Twitter feed? Tweet us the stories you're talking about using #InstantIndex or email us at ABC.WorldNews@abc.com and they could appear on World News.

Mystery Flower Girl Becomes Overnight Sensation A mystery flower girl is becoming an overnight sensation for her amazing dance moves down the aisle. She performed Psy's famous "Gangnam Style" moves, and as if that weren't enough, she ended with a split.

Hollywood Sign Turns 90 A big "Happy Birthday" is in order for the Hollywood sign that turns 90 today. The Los Angeles sign, with its nine letters each 45 feet tall, got a kind of facial last year with 110 gallons of primer and 275 gallons of fresh paint. It once said Hollywood Lane up on that hill. By 1978, termites had attacked and caused its decay, and an unlikely hero, Hugh Hefner, saved the day. He auctioned off L-A-N-D to raise money and repair the iconic sign.

(Robyn Beck/AFP/Getty Images)

Bruce Springsteen Assists With Proposal Bruce Springsteen played Cupid on stage in Sao Paulo, Brazil. As the band played "She's the One," The Boss helped a young woman and her boyfriend onstage. The boyfriend took the mic and popped the question. After she said yes, Springsteen hugged the lovebirds and serenaded the happy couple for a celebratory dance.

Former Heavyweight Champion Dies at 70 Former heavyweight champion Ken Norton died at the age of 70. He took on Mohammed Ali in 1973 and after breaking Ali's jaw, Norton went on to win the fight in a major upset. After Norton retired from the ring, he became an actor and was nearly cast as Rocky's nemesis Apollo Creed.