The IF I HAD A HAMMER SINGER is a two-person act consisting of Jennifer Lopez, also known as J.Lo, and Pete Seeger. Lopez is a five-letter word, LOPEZ, and Seeger is a six-letter word, SEEGER. Lopez is an American singer, songwriter, actress, and producer who has been active in the entertainment industry since the 1980s. Seeger was an American folk singer and social activist who was a prominent figure in the mid-20th century American folk music revival.