Also, post- grunge started to become popular with bands like Creed and Foo Fighters, Nu-Metal began its mainstreaming with Limp Bizkit, Deftones, and Incubus, Hanson released ' Mmmbop', and more music videos by artists such Puff Daddy (' Mo Money Mo Problems'), Will Smith ('Gettin' Jiggy wit It', 'Men in Black'), and the Spice Girls ('Say You'll Be There') were done in the Y2K style. and gained international popularity, leading to a new era in teen pop, and in a Super Bowl ad that year the group heralded the arrival of 'Generation Next'. The Spice Girls' single 'Wannabe' was released in the U.S. The Y2K Era became well-defined by 1997, replacing the Core '90s Era which had been known for its grittier aesthetics such as Grunge.