Singer Demi Lovato hit the red carpet at designer Stella McCartney's 2016 Pre-Fall Collection show at Amoeba Music in Hollywood, catching up with "Extra's" Renee Bargh. Demi chatted about why she loves wearing Stella McCartney, and about celebrating 6 years of friendship with her boyfriend Wilmer Valderrama. Demi also talked about the $1.5 billion Powerball lottery.