1. - Keenan Jackson (born March 9, 1990), most known by his stage name YG (short from Young Gangsta), is an African-American Compton-based rapper and songwriter of the West Coast scenery. In his earlier years he was gang affiliated with the Westside Tree Top Piru gang. He was signed by Def Jam in 2009 and released his first single titled “Toot It and Boot It” in 2010. He is most associated with the Jerkin’ movement based in California alongside other artists including singer and occasional rapper Ty$, who sings the hook on “Toot It and Boot It”. He is affiliated with the group Pu$haz Ink.
2. - A Russian hip-hop/rapper from Moscow, see the links in the wiki sources and the Russian wiki for more info.
3. - The pseudonym (“Young Gary”) and band name of US singer and guitarist Gary Pfaff who released his “Straight UP” album under this name. See his artist profile and link in the wiki sources for more info.