all four singles reached the top 10, with the first and fourth releases peaking at No. 2. "All I Do" had originally been written by a teenaged Wonder and collaborators Clarence Paul and Morris Broadnax in 1966. Tammi Terrell recorded the first version of the song that year, but it remained in the Motown vaults until it was included in the compilation A Cellarful of Motown! in the UK in 2002, 32 years after Terrell's death. Brenda Holloway also recorded a version of the song, which was released in 2005 on her Motown Anthology set. Michael Jackson, Eddie Levert and Walter Williams of the O'Jays, and Betty Wright provided backing vocals for Wonder's recording of the song for Hotter than July. The backing vocals for "I Ain't Gonna Stand for It" were handled by Charlie and Ronnie Wilson of the GAP Band, and Wonder's ex-wife Syreeta backed Wonder on "As If You Read My Mind". While a number of Wonder's previous works, such as Songs in the Key of Life and Innervisions, had received wide critical acclaim and had chart success, Hotter than July was his first album eligible to be certified Platinum by the RIAA, as Motown sales records before 1977 were not audited by the organization after they introduced the category. Sleeve liner design and Martin Luther King Jr. Day activism Wonder wrote "Happy Birthday" to honor Martin Luther King Jr. and used the song to campaign for King's birthday, January 15, to become a national holiday in the United States (Martin Luther King Jr. Day would be declared a federal holiday in 1983, and first be celebrated nationwide in 1986). The design of Hotter Than July'''s original record sleeve is also dedicated to these two purposes. Both sides of the sleeve are printed in a black-and-white semi-glossy photographic process. One side features a large square photographic portrait of King inset on a black background with white lettering above and below. Above the photo is printed "Martin Luther King, Jr." "January 15, 1929 – April 4, 1968" (on two lines, centered), and below it appears a passage of text written by Wonder, which reads: It is believed that for a man to lay down his life for the love of others is the supreme sacrifice. Jesus Christ by his own example showed us that there is no greater love. For nearly two thousand years now we have been