Aging rapper Jay Z, who turns 43 on Dec. 4, fumbled the lyrics to two of his best-known songs during a one-man set Monday night, according to Yahoo Music. Jay Z’s live performance at the Amex Sync Show, which was live streamed from the SXSW Music Festival in Austin, was met with mixed reviews.

“The concert’s first half gave the impression of a man performing for a corporate-sponsored promo event. This was not the rapper’s finest 90 minutes,” wrote a The Guardian reporter, who watched the show online.

The Huffington Post noted that Jay Z forgot the lyrics to two of his songs, “Jigga What, Jigga Who” and his Grammy award winning “Empire State Of Mind.”

“The mixups, when paired with the crowd’s surprisingly tepid respond to such an intimate performance from one of music’s biggest stars made for somewhat disappointing set,” The Post critic wrote.