Lots of stars turned out on the red carpet for the Billboard Music Awards, and many came with their partners. Jennifer Lopez and Casper Smart are counting up the years, there were Chrissy Teigen and John Legend, Ryan and Genevieve Tedder (who are expecting their child soon), Amber Rose and Wiz Khalifa, Shakira and Gerard Pique, Jordin Sparks and Jason Derulo, as well as Iggy Azalea and her boo.
