What is Toto's most famous song?

Toto's most famous song is Africa, released in 1982 on the album Toto IV. While Toto had many hits, Africa has become by far the most recognized, culturally enduring, and commercially successful song in their catalog. Written by keyboardist David Paich and drummer Jeff Porcaro, Africa reached number one on the Billboard Hot 100 in February 1983 and won critical acclaim for its lush production, iconic marimba-like keyboard riff, layered percussion, and anthemic chorus with the line I bless the rains down in Africa. Over the past four decades, Africa has had a remarkable second life. It has been streamed over 1.5 billion times on Spotify, featured in countless movies, TV shows, and memes, and covered by artists like Weezer, whose 2018 cover became a hit itself. Its music video has over a billion views on YouTube. While Rosanna won Record of the Year at the Grammys and Hold the Line was their debut hit, neither has matched Africa's global cultural penetration. Africa is played at sporting events, weddings, and karaoke nights worldwide and is instantly recognizable within the first few notes. For younger generations who may not know Toto's other songs, Africa is often the only Toto song they know, cementing it as the band's signature and most famous song by a wide margin.