On April 1, 2021, Rodrigo released another song, "Deja Vu". It came out at number eight on the "Billboard" Hot 100. This made her the first artist to have their first two releases in the top 10 of the Hot 100. Her third song, "Good 4 U", came out on May 14, 2021. It became her second song to reach number one on the Hot 100. "Sour", her first studio album, was released on May 21, 2021. It had good reviews. In a review by "Slate", it said that the album's first three songs helped create Rodrigo's "early status as Gen-Z's most [talented] new artist". According to "Clash", Rodrigo is seen as one of Generation Z's best artists. "Variety" called her "the voice of her generation" in its cover story of Rodrigo. "Sour" came out at number one on the "Billboard" 200 chart and spent a total of five weeks at the spot, becoming the longest lasting number-one album by a female artist in 2021.