Machine Gun Kelly

Treat yourself.

The MGK-Travis Barker project gets another name contributor.

You may be surprised.

Plus a new song before the year is out.

Hear the collaboration between the three musicians.

Happy birthday to you, Mr. Kelly.

Take a look behind the scenes.

See footage from the star-studded show.

Nikki Sixx reveals 'The Dirt' star will collaborate on Motley music as well.