Dogg, 42, shared a 30-second snippet of the song while he rolls a blunt alongside longtime collaborator and friend Kurupt, reported Aceshowbiz.
"I gets my groove on/ I do my thang/ My planet's Krypton, home of the freaks/ Come get yo moon rocks/ I am a G," Dogg is heard rapping before Williams' vocals emerge to sing lines like, "When lightning strikes, you know it."
It is not know yet, when the duo's new collaboration will be released in full.
The two last worked on hit track 'Drop It Like It's Hot' from Dogg's album 'R&G (Rhythm & Gangsta): The Masterpiece' (2004) and before that on 'Beautiful' from his 2002 album 'Paid tha Cost to Be da Boss'.