Girl group Little Mix performed live on 'America's Got Talent' last night (September 9) and blew the audience away with their impressive vocals and exciting accompanying acrobatics. 

Following their amazing rendition of 'Black Magic', for which they were joined by AcroArmy, the girls told fans online that they had a great time and really enjoyed it: "Thank you, @nbcagt for having us! We had an absolute blast performing #BlackMagic!!"

Judge and Spice Girls member Melanie B shared a photo of herself posing with the hitmakers (pictured left) and accompanied it with the following caption: "Awwww the ladies @littlemix lovely seeing you today #AGT10. Love you ladies."

Supermodel and panelist Heidi Klum also tweeted about Little Mix's performance, writing: "Great job, @littlemix!! That song is gonna be stuck in my head all night! #BlackMagic." The girls replied: "@heidiklum thank you lovely! Glad you love the song."

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