With the controversial Amy Winehouse documentary Amy only days away from theaters, it's hard not to remember the hole Winehouse left in popular music when she passed away in 2011. Upbeat hits like "Rehab" and "Valerie" clearly showed off her jazz influences, whereas chilling ballads like "Back to Black" revealed her depth as a songwriter. There's no one like Amy, but here are a few artists who might fill the empty space she left in your heart.

1. Wild Child, "Living Tree"

When Texas natives Kelsey Wilson and Alexander Beggins first met in 2009, they were touring with Danish pop artist The Migrant. Wilson was a classicly trained violinist and Beggins a ukulele player finishing up school at the University of Texas. During one night of "backseat business school"—which they described as drinking excessive amounts of red wine while studying—the two wrote their first song together and never stopped.

While recording their 2010 record Pillow Talk, the duo brought in four more musicians to create the indie-folk band that is now Wild Child. The band is now made up of Wilson—who hadn't ever sang in public before becoming Wild Child's lead vocalist—Beggins, keyboardist Evan Magers, multi-instrumentalist Matthew Mares, drummer Carey McGraw, and cellist Sadie Wolfe. They'll be touring in July, so check out if any of their tour dates are near you. 

2. Quadron, "Slippin"

Though it may sound like a one-woman show, Quadron consists of singer Coco O and music producer and instrumentalist Robin Bruan, also known as Robin Hannibal. Originating in Denmark, the duo are a product of the electronic collective Boom Clap Bachelors, and began working together in 2009 with "Slippin," the song that got them noticed across the world. They've since collaborated with artists like Kendrick Lamar, The Internet, and Tyler, The Creator.

The duo freshly blends soul and electronic music to create a completely unique sound with a sultry taste. Sound familiar? You may have heard Coco singing "Where the Wind Blows" on the soundtrack of Baz Luhrmann's 2013 remake of The Great Gatsby.

3. ZZ Ward, "365 Days (The Summer's Over)"

When ZZ Ward's album Til the Casket Drops debuted in 2012, she turned heads with her raspy voice and sometimes eerie songs about—wait for it—guns and caskets. Not surpisingly, she then landed her album's title track on season three of the ABC Family TV show Pretty Little Liars and followed up two years later with the ballad "Last Love Song" on the show's 2014 Christmas special.

Ward's second album THIS MEANS WAR is scheduled to be released on Sept. 18. Her style is a little different now, so check out her newest single and music video, "LOVE 3X." 

4. Cécile McLorin Salvant, "Nobody"

Though Winehouse had jazz influences, Cécile McLorin Salvant is purely a jazz artist. Born in Miami, Fla. to a French mother and Haitian father, Salvant started playing piano at age five and joined a local choir three years later. At 18, she moved to France to study law and classical and baroque voice and discovered her passion for jazz. Fast forward seven years and Salvant is making new and poignant jazz music at age 25.

Her album WomanChild was nominated for Best Jazz Vocal Album at 2014 Grammy Awards, and her third album For One to Love is scheduled to be released on Sept. 4 of this year. If you're really excited, you can even pre-order it on iTunes now.

5. Zee Avi, "Bitter Heart"

With a lightness reminiscent of Jack Johnson, Zee Avi's voice floats over and curls around lyrics in a way that makes you wonder if she could be the love child of Norah Jones and Sara Bareilles. Born on the island of Borneo, Avi spent her childhood in Malaysia before moving to London to study fashion design... meaning not only can she sing, write songs, play guitar and strum a ukulele, she is also a visual artist.

Avi started posting videos on YouTube in 2007, but it wasn't until the website featured her video “No Christmas For Me" that she was discovered. Patrick Keeler, the drummer for the Raconteurs, was one of many who took notice. According to her website bio, Keeler's enthusiasm for her work led Avi into a publishing deal with the management company Monotone and a record deal with Jack Johnson's label Brushfire Records. (Not bad.) Check out her latest album Zee Avi's Nightlight on Spotify or buy it on iTunes.

6. Grace, "Dirty Harry"

18-year-old Australian singer Grace Sewell dropped her first EP in May with a single that was already #1 on the charts down under. Within a week, she released her first music video, featuring her take on the 1963 hit "You Don't Own Me" with new verses rapped by G-Eazy. Now, she's eating leafy chicken salads and talking to Billboard about her music. None of this is surprising, because Grace's blend of hip-hop beats and bluesy vocals makes her music not only unique, but seriously catchy. 

The EP's title track "Memo (Boyfriend Jeans)" is a more stripped-down look at what the singer's voice can do—it was even recorded on an iPhone. Check out her 2014 cover of Winehouse's "Valerie" if you want more.

7. Alessia Cara, "Here"

Ontario native Alessia Caracciolo has a smoky voice and insightful lyrics that make her seem much older than 18. Her first single, “Here,” deviates from popular teenage music by serving as an anti-party anthem for the kids in high school who just want to spend their nights in other ways. In fact, the song's music video recreated the party that inspired her lyrics, and many of the original attendees reportedly make appearances.

Caracciolo taught herself to play guitar by ear at age 10, and three years later started the YouTube channel that would ultimately lead to her discovery and contract with Def Jam Records. She includes Winehouse and Lauryn Hill in her list of influences, so keep an eye out for her debut album.