Rasual Butler and Leah LaBelle pose for photos on the red carpet at the NBA Awards Show on June 26, 2017.

Celebrities and fans alike took to Twitter on Wednesday (Jan. 31) to mourn the loss of R&B singer and American Idol alum Leah LaBelle and her husband, ex-NBA star Rasual Butler. The couple were killed early Wednesday in a single-car accident in Studio City, California.

LaBelle appeared on season 3 of Idol, alongside Jennifer Hudson and Fantasia, back in 2004 and was later signed to Epic Records, in a joint deal between Jermaine Dupri's So So Def Records and Pharrell's I Am Other label. Butler played on several NBA teams during his 13-year career, including the Los Angeles Clippers, the San Antonio Spurs and the Chicago Bulls.

LaBelle charted two songs on Billboard's charts: "Sexify," which reached No. 89 on Hot R&B/Hip-Hop Songs and No. 23 on the Adult R&B Songs airplay charts in 2012, and "Lolita," which peaked at No. 7 on Dance Club Songs.

See some of the reactions below, including from LaBelle's former label head Pharrell, onetime tourmate JoJo and fellow Idol season 3 contestant (and eventual winner) Fantasia.

Leah. beautiful sister from another mister. You will NEVER EVER be forgotten. Your voice. Your spirit. Your light. Cannot comprehend what this loss means. Thinking about your unwavering faith in God brings me peace. I love you, forever angel. pic.twitter.com/ZqmNeHfuAb — JoJo. (@iamjojo) January 31, 2018

Members of the NBA community also voiced their condolences on Twitter.

Rest In Peace my brother ----#RasualButler — Kobe Bryant (@kobebryant) January 31, 2018

Come on man. Damn. The world just lost a great dude. RIP Rasual “Bop” Butler! https://t.co/tufRq2H3AI — DWade (@DwyaneWade) January 31, 2018

I'm Terribly sorry to hear about the death of Rasual Butler and his wife. Thoughts & Prayers go out 2 his family and everyone affected by this terrible accident! — Isaiah Thomas (@isaiahthomas) January 31, 2018

Rip Bro bro ---------------- pic.twitter.com/92Oy2qPUaf — Paul Pierce (@paulpierce34) January 31, 2018

Show the people you care about most the love they deserve. Life is short. My deepest condolences to @RasualButler45 @leahlabelle and their families. May God be with you. — Jake T. Austin (@JakeTAustin) January 31, 2018