houston released her first album, "whitney houston", in 1985. it featured the number-one singles "saving all my love for you", "greatest love of all", and "how will i know". her second album, "whitney", was released in 1987 and featured the number-one hits "i wanna dance with somebody" and "so emotional". in 1990, her album "i'm your baby tonight" was released, and the song of the same name also reached number one on the us "billboard" hot 100, as did the single "all the man that i need". she sang the national anthem at the 1991 super bowl and earned widespread praise for the performance. she starred in the film "the bodyguard" in 1992 and performed several songs on its soundtrack, one of which was a cover of country singer-songwriter dolly parton's song, "i will always love you". the song became houston's biggest hit of her career and reached number one in countries around the world. houston sat throughout much of the music video for "i will always love you" because she was pregnant with her daughter, bobbi kristina brown. "i will always love you" became the bestselling song by a female artist, with the soundtrack for "the bodyguard" becoming the bestselling film soundtrack ever. she performed with singer-songwriter mariah carey on the song "when you believe" for the film "the prince of egypt".