Photo Flash: Justin Bieber, Ne-Yo Perform on AMERICA'S GOT TALENT

Related: Photos, NBC's AMERICA'S GOT TALENT, Justin Bieber, NE-YO

An amazing lineup of performers graced the AMERICA'S GOT TALENT stage during finale week on September 14, including musical performances by Justin Bieber and NE-YO. Check them out below!

On the heels of his hit singles "Boyfriend" and "As Long As You Love Me" feat. Big Sean from his latest album BELIEVE, global superstarJustin Biebermakes his next stop on the America's Got Talent stage for the show's grand finale, airing September 13th. His latest studio effort BELIEVE is Justin's fourth #1 album debut and the highest debut album of the year, with four hit singles on the chars prior to the album's release with "Boyfriend," "All Around the World" featuring Ludacris, "Die In Your Arms," and second single "As Long As You Love Me" featuring Big Sean. BELIEVE debuted at #1 in 30 countries, including top markets the U.S., UK, Canada, Australia, Brazil and more and is the highest Billboard soundscan debut of the year.

Multi-platinum, three-time Grammy Award-winning artist NE-YO joins the AGT stage to perform his hit single "Let Me Love You (Until You Learn To Love Yourself)," from his upcoming album, R.E.D., arriving in-stores in November. R.E.D. is NE-YO's first album for Motown after seven hugely successful years and four RIAA gold and platinum albums as a core member of IDJ since 2005. In January 2012, NE-YO was also named Senior Vice President of A&R for Motown, working alongside Barry Weiss, Chairman & CEO of Universal Republic and Island Def Jam Motown. NE-YO's arrival at Motown in 2012 caps an incredible run at sister label Def Jam, where his first three studio albums all debuted at #1 Soundscan and were all certified RIAA platinum: In My Own Words (2006), Because Of You (Grammy Award(R)-winning Best Contemporary R&B Album for 2007), and Year Of The Gentleman (2008), which spun off a trio of RIAA platinum hits: "Closer" (#1 U.S. Dance, #1 UK), "Miss Independent" (#1 U.S. R&B, #1 UK R&B), and "Mad" (#5 U.S. R&B, #3 UK R&B). "Miss Independent" went on to win Grammy Awards(R) for Best R&B Song (song writers award) and Best Male R&B Vocal Performance.

Photo credit: Virginia Sherwood/NBC