Ambwene Allen Yessayah, popularly known as A-Y, is a hip-hop and Bongo flava musician from Tanzania. He is seen as one of East Africa's biggest artistes, getting good airplay in Kenya and Uganda as well.

He nurtured dreams of being a pilot before he got into music. He ended up studying Information technology and financial management.

His debut album, Raha Kamili, was released in 2003. His second album, Hisia Zangu, had the track Binadamu (a song about poverty) which he did with Uganda's Maurice Kirya and Ham K. He featured many East African artistes in this album. He even featured Namibia's Gal Level.

He is part of the East Coast team with King Crazy GK. He also collaborated with Kenya's Jua Cali and Uganda's Baba Luku on the UTAKE anthem which stands for Uganda, TAnzania and KEnya.

Some of his popular songs include Sifa hiyo, Ni taha tu, Machoni kama watu, Nipe nikupe, Wote, Inatengemea na mtu, Kutoka kwa AY, Kimya chako,