Houston was considered by many to be a "singer's singer", who had an influence on countless other vocalists, both female and male.[118][337] Similarly, Steve Huey from Allmusic wrote that the shadow of Houston's prodigious technique still looms large over nearly every pop diva and smooth urban soul singer – male or female – in her wake, and spawned a legion of imitators.[333] Rolling Stone, on her biography, stated that Houston "redefined the image of a female soul icon and inspired singers ranging from Mariah Carey to Rihanna".[338] Essence ranked Houston sixth on their list of 50 Most Influential R&B Stars of all time, calling her "the diva to end all divas".[339]

Numerous artists have acknowledged Houston as an influence, including Celine Dion,[340] Mariah Carey,[118] Toni Braxton,[341] Lady Gaga,[342] Christina Aguilera,[343] LeAnn Rimes,[344] Jessica Simpson,[345] Nelly Furtado,[346] Kelly Clarkson,[347] Britney Spears,[348] Ciara,[349] Pink,[348] Aneeka,[350] Ashanti,[351] Hayley Williams, Robin Thicke,[352] Jennifer Hudson,[353] Stacie Orrico,[354] Amerie,[355] Destiny's Child,[348][356] and Ariana Grande.[357] Mariah Carey, who was often compared to Houston, said, "She [Houston] has been a big influence on me."[358] She later told USA Today that "none of us would sound the same if Aretha Franklin hadn't ever put out a record, or Whitney Houston hadn't."[359] Celine Dion who was the third member of the troika that dominated female pop singing in the 1990s, did a telephone interview with Good Morning America on February 13, 2012, saying "Whitney's been an amazing inspiration for me. I've been singing with her my whole career, actually. I wanted to have a career like hers, sing like her, look beautiful like her."[360] Beyoncé told the Globe and Mail that Houston "inspired [her] to get up there and do what [she] did".[361] She also wrote on her website on the day after Houston's death, "I, like every singer, always wanted to be just like [Houston]. Her voice was perfect. Strong but soothing. Soulful and classic. Her vibrato, her cadence, her control. So many of my life's memories are attached to a Whitney Houston song. She is our queen and she opened doors and provided a blueprint for all of us."[362]

Mary J. Blige said that Houston inviting her onstage during VH1's Divas Live show in 1999 "opened doors for [her] all over the world".[363] Brandy stated, "The first Whitney Houston CD was genius. That CD introduced the world to her angelic yet powerful voice. Without Whitney, half of this generation of singers wouldn't be singing."[364] Kelly Rowland, in an Ebony's feature article celebrating black music in June 2006, recalled that "[I] wanted to be a singer after I saw Whitney Houston on TV singing 'Greatest Love of All'. I wanted to sing like Whitney Houston in that red dress." She added that "And I have never, ever forgotten that song [Greatest Love of All]. I learned it backward, forward, sideways. The video still brings chills to me.