Track was first performed on tour in South America earlier this month
As promised, the first night of the Metallica By Request tour includes brand new material
Band working on new song in rehearsals ahead of live show in Colombia on Sunday (March 16)
'This Is Your Life' is set for release on March 31
The guitarist said he'd be 'up for' releasing their new record in 2015
Metal giants give progress update on long-awaited new LP
The drummer recalls missing out at the awards ceremony in 1989
Band's guitarist says metal giants will be in the studio very soon
Katy Perry, Pink and Kendrick Lamar have also been added to the lineup for the awards ceremony
'Freeze 'Em All' is available now to download