Arbaiyah Abdul Manan or better known as Abby Abadi was a Malaysian singer from girl band ELITE before leaving it in 1998 and actress who stars on the popular police drama, Gerak Khas. She won the Berita Harian's Anugerah Bintang Popular Award for Most Popular TV Actress in 2000, 2001, 2002, and 2003.

She joined the Wheel of Fortune-based game show Roda Impian during its second season, as co-host. After two season, she later left the show.

Abadi was also filming for the TV series Gerak Khas, playing one of the leads, Inspektor Aleeza. Its popularity led in 2001 to a hit feature film based on the series. Two sequels followed, with more modest success. In 2005, she had a part as Atikah on 'Kamasutra'.