Here's what Alanis Morissette looked like back in the '90s: Rick Diamond / Getty Images
And here's what Alanis Morissette looks like today: Jeremy Chan / Getty Images
Alanis Morissette in the '90s vs. today: Rick Diamond / Getty Images, Jeremy Chan / Getty Images
Here's what Courtney Love looked like back in the '90s: Bill Tompkins / Getty Images
And here's what Courtney Love looks like today: Dave J Hogan / Dave J. Hogan / Getty Images
Courtney Love in the '90s vs. today: Bill Tompkins / Getty Images, Dave J Hogan / Dave J. Hogan/Getty Images
Here's what Lauryn Hill looked like back in the '90s: Anthony Barboza / Getty Images
And here's what Lauryn Hill looks like today: Prince Williams / FilmMagic / Getty Images
Lauryn Hill in the '90s vs. today: Anthony Barboza / Getty Images, Prince Williams / FilmMagic / Getty Images
Here's what Snoop Dogg looked like back in the '90s: Al Pereira / Getty Images
And here's what Snoop Dogg looks like today: Christopher Polk / Penske Media via Getty Images
Snoop Dogg in the '90s vs. today: Al Pereira / Getty Images, Christopher Polk / Penske Media via Getty Images
Here's what Natalie Imbruglia looked like back in the '90s: Steve Granitz / WireImage / Getty Images
And here's what Natalie Imbruglia looks like today: Sam Tabone / Getty Images
Natalie Imbruglia in the '90s vs. today: Steve Granitz / WireImage / Getty Images, Sam Tabone / Getty Images
Here's what Billie Joe Armstrong looked like back in the '90s: Tim Mosenfelder / Getty Images
And here's what Billie Joe Armstrong looks like today: Steve Jennings / WireImage / Getty Images
Billie Joe Armstrong in the '90s vs. today: Tim Mosenfelder / Getty Images, Steve Jennings / WireImage / Getty Images
Here's what Lou Bega looked like back in the '90s: Steve Granitz / WireImage / Getty Images
And here's what Lou Bega looks like today: Tristar Media / Getty Images
Lou Bega in the '90s vs. today: Steve Granitz / WireImage / Getty Images, Tristar Media / Getty Images
Here's what Macy Gray looked like back in the '90s: Mick Hutson / Redferns / Getty Images
And here's what Macy Gray looks like today: Nbc / NBCU Photo Bank via Getty Images
Macy Gray in the '90s vs. today: Mick Hutson / Redferns / Getty Images, Nbc / NBCU Photo Bank via Getty Images
Here's what Hanson looked like back in the '90s: Michael Ochs Archives / Getty Images
And here's what Hanson looks like today: Medios Y Media / Getty Images
Hanson in the '90s vs. today: Michael Ochs Archives / Getty Images, Medios Y Media / Getty Images
Here's what Shania Twain looked like in the beginning of her music career in the early 1990s: Nbc / NBCU Photo Bank / NBCUniversal via Getty Images
And here's what Shania Twain looks like today: Terry Wyatt / Getty Images for ACM
Shania Twain in the '90s vs. today: Nbc / NBCU Photo Bank / NBCUniversal via Getty Images, Terry Wyatt / Getty Images for ACM
Here's what Sir Mix-a-Lot looked like back in the '90s: Tim Mosenfelder / Getty Images
And here's what Sir Mix-a-Lot looks like today: Tim Mosenfelder / Getty Images
Sir Mix-a-Lot in the '90s vs. today: Tim Mosenfelder / Getty Images
Here's what Dave Grohl looked like back in the '90s: Paul Bergen / Redferns / Getty Images
And here's what Dave Grohl looks like today: Cbs Photo Archive / CBS via Getty Images
Dave Grohl in the '90s vs. today: Paul Bergen / Redferns / Getty Images, Cbs Photo Archive / CBS via Getty Images
Here's what Lil' Kim looked like back in the '90s: Scott Gries / Getty Images
And here's what Lil' Kim looks like today: Aaron J. Thornton / WireImage / Getty Images
Lil' Kim in the '90s vs. today: Scott Gries / Getty Images, Aaron J. Thornton / WireImage / Getty Images
Here's what Christina Aguilera looked like back in the '90s: Tim Roney / Getty Images
And here's what Christina Aguilera looks like today: Manny Hernandez / Wireimage / Getty Images
Christina Aguilera in the '90s vs. today: Tim Roney / Getty Images, Manny Hernandez / Wireimage / Getty Images
Here's what Mel B from the Spice Girls looked like back in the '90s: Michael Ochs Archives / Getty Images
And here's what Mel B from the Spice Girls looks like today: Karwai Tang / WireImage / Getty Images
Mel B in the '90s vs. today: Michael Ochs Archives / Getty Images, Karwai Tang / WireImage / Getty Images
Here's what Lenny Kravitz looked like back in the '90s: Avalon / Getty Images
And here's what Lenny Kravitz looks like today: Kevin Mazur / WireImage / Getty Images
Lenny Kravitz in the '90s vs. today: Avalon / Getty Images, Kevin Mazur / WireImage / Getty Images
Here's what Eddie Vedder from Pearl Jam looked like back in the '90s: Gie Knaeps / Getty Images
And here's what Eddie Vedder looks like today: Stefani Reynolds / AFP via Getty Images
Eddie Vedder in the '90s vs. today: Gie Knaeps / Getty Images, Stefani Reynolds / AFP via Getty Images
Here's what Sarah McLachlan looked like back in the '90s: Steve Granitz / WireImage / Getty Images
And here's what Sarah McLachlan looks like today: Jeremy Chan Photography / Getty Images
Sarah McLachlan in the '90s vs. today: Steve Granitz / WireImage / Getty Images, Jeremy Chan Photography / Getty Images
And finally, here's what Mariah Carey looked like back in the '90s: Images Press / Getty Images
And here's what Mariah Carey looks like today: Kevin Mazur / Getty Images for Global Citizen
Mariah Carey in the '90s vs. today: Images Press / Getty Images, Kevin Mazur / Getty Images for Global Citizen
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