After wowing the judges with their heavy metal audition, 6-year-old Aaralyn and her 9-year-old brother Izzy (aka Murp) delivered another brutal metal blow to 'America's Got Talent' during the Las Vegas round. Their latest performance, which aired this week on NBC, determined whether they would advance to the live performances at New York City's Radio City Music Hall.

Aaralyn and Izzy chose to perform their song 'Lullaby Crash' for their Vegas audition. The track starts off slow and sweet before Aaralyn melts faces with her gutteral vocals about 15 seconds into the song, opening wide the mouths of the judges and Murp's fellow competitors.

While judge Howard Stern stated after the performance that he felt they didn't deserve to advance, fellow judge Howie Mandel strongly disagreed. In the end, it was revealed that Aaralyn and Izzy did make it to the next round, where they'll perform on live TV at New York's Radio City Music Hall.

Congrats to Murp for continuing to carry the metal torch on 'America's Got Talent.' Watch their performance of 'Lullaby Crash' above.