Which Beyoncé song features rapper Jay-Z and begins her solo-album era?

“Crazy in Love” is the Beyoncé song featuring rapper Jay-Z that launched her solo-album era. Released in 2003 as the lead single from Dangerously in Love, it pairs Beyoncé's vocal performance with a rap verse from Jay-Z and a prominent sampled horn figure from the Chi-Lites' “Are You My Woman (Tell Me So).”

The song was written by Beyoncé, Jay-Z, Rich Harrison, and Eugene Record. Harrison created the distinctive arrangement, while the recording's energetic brass hook became one of its most recognizable musical features.

“Crazy in Love” reached number one on the Billboard Hot 100 and became Beyoncé's first solo number-one single on that chart. It also won two Grammy Awards at the 46th ceremony, including Best R&B Song and Best Rap/Sung Collaboration.

It is often mixed up with “Drunk in Love,” another Beyoncé-and-Jay-Z collaboration from the 2010s. “Drunk in Love” appeared on Beyoncé's 2013 self-titled album, not her debut solo album.