The year 1999 was a great one, and not just because of all the fantastic teen movies  that came out. Pop music was having a moment thanks to budding stars Britney Spears , Christina Aguilera , and Jessica Simpson . On the flip side, Eminem  was repping rap, Dixie Chicks were introducing a new generation to country music, TLC was their coolest group around, and Creed was all over the radio. On their 15th anniversary, let's celebrate all these ageless albums.
. . . Baby One More Time by Britney Spears
Breakout Track: ". . . Baby One More Time"
It's been 15 years since Britney Spears  was launched to pop diva stardom with her debut, . . . Baby One More Time. The title track anchored the album, but "(You Drive Me) Crazy" and the reggae-themed "Soda Pop" still hold up.
Millennium by Backstreet Boys
Breakout Track: "I Want It That Way"
This was Backstreet Boys' third album, but it's arguably the best one of all time. "I Want It That Way" and "Larger Than Life" were both huge hits that year — good luck getting them out of your head now.
Christina Aguilera by Christina Aguilera
Breakout Track: "Genie in a Bottle"
Cue the pop princess war! Christina Aguilera 's first album bowed in 1999, and it included hits like "Genie in a Bottle," "What a Girl Wants," and "Come on Over (All I Want Is You)." It's worth noting that Aguilera beat out Spears to win best new artist at the 2000 Grammys.
Fanmail by TLC
Breakout Track: "No Scrubs"
After a three-year hiatus, TLC returned with FanMail, which earned them three Grammys. The entire album is gold, but "No Scrubs" is indubitably the anthem people remember, though "Unpretty" is timeless.
Sweet Kisses by Jessica Simpson
Breakout Track: "Woman in Me (featuring Destiny's Child)"
Before Jessica Simpson  ever questioned Chicken of the Sea or became a shoe mogul, she was a legit pop star. Sweet Kisses contained such ballads and feel-good songs as "I Wanna Love You Forever" and the John Mellencamp-based "I Think I'm in Love With You." And how's this for a time capsule: ex-husband Nick Lachey  dueted with her for the love song "Where You Are."
On the 6 by Jennifer Lopez
Breakout Track: "If You Had My Love"
Just to date this a bit, On the 6, Lopez's debut album, was produced by her then-boyfriend Sean Combs. "If You Had My Love" made it to No. 1 on the US charts, while "Let's Get Loud" is still one of her signature hits, and "Waiting For Tonight" is straight-up classic.
Enema of the State by Blink-182
Breakout Track: "What's My Age Again?"
It's hard to call out one track on Enema of the State, because there are so many good ones. Remember "Adam's Song" and "All the Small Things"? If you were a disillusioned teen in 1999, this was your jam.
The Slim Shady LP by Eminem
Breakout Track: "My Name Is"
While pop princesses were rising to fame, Eminem  was breaking out as the antipop star. The Slim Shady LP is his second studio album, but it's the one that put him on the map as an artist to reckon with. His 2000 Grammys wins included best rap album and best rap solo performance for "My Name Is."
Californication by Red Hot Chili Peppers
Breakout Track: "Californication"
Red Hot Chili Peppers' 1999 album is a revelation, and the title track has serious staying power. The smooth sounds of "Californication" continue to play on the radio today, though maybe not every two minutes, as was the case back in the day.
Astro Lounge by Smash Mouth
Breakout Track: "All Star"
There was nothing cooler across middle schools nationwide than Smash Mouth in 1999. "All Star" was all the rage, "Then the Morning Comes" was fantastic, and "Can't Get Enough of You, Baby" is still so, so good.
Vitamin C by Vitaman C
Breakout Track: "Graduation (Friends Forever)"
For a hot second, Vitamin C was serious competition for Britney Spears  and Jessica Simpson . She was kind of the cooler, edgier pop girl. Her self-titled debut went platinum, thanks to tracks like "Smile," "Me, Myself & I," and "I Got You." Mostly though, people just listed to "Graduation (Friends Forever)" and cried with their high school friends.
Human Clay by Creed
Breakout Track: "With Arms Wide Open"
There was a very brief period in 1999 when you didn't hate "With Arms Wide Open" or "Higher" yet. Seriously, they were really popular!
Fly by Dixie Chicks
Breakout Track: "Cowboy Take Me Away"
You couldn't go anywhere in 1999 without hearing about Dixie Chicks. Eight of the tracks from Fly were released as singles to epic commercial success, and the album itself debuted at No. 1 on the Billboard 200.
Play by Moby
Breakout Track: "Porcelain"
Remember when liking Moby was cool? OK, maybe liking Moby is still cool. This album was unavoidable in 1999, especially the entrancing "Porcelain."
Supernatural by Santana
Breakout Track: "Smooth"
Latin group Santana had been popular for years before Supernatural dropped, but it was "Smooth," their collaboration with Rob Thomas, that landed on every mainstream station in 1999. They swept the 2000 Grammy awards, earning record of the year, album of the year, and song of the year.