Rebecca Rose Johnson, professionally known as Bekuh Boom (stylized as Bekuh BOOM) is an American singer and songwriter. Johnson signed her first publishing deal to Warner Chappell Music at the age of 18.^[1][2] She featured on two co-written singles: "I Won't Let You Down" by Danish singer Christopher, which charted at #1 on Tracklisten, the official Danish music charts,^[3] and "Money" by Norwegian electronic duo Broiler, which peaked at #3 on Norwegian music charts.^[4] As of 2016 she has written over 10 songs reaching the #1 position on various music charts. Boom wrote and composed for various acts including R. Kelly, Jordin Sparks, Christopher, Taeyang, Winner, Blackpink and Lisa.

Bekuh Boom was born Rebecca Rose Johnson on June 21, 1994, in Orange County, California. She stated that she had an interest in music since elementary school. At the age of 11, she began learning how to write and compose her own melodies for her songs. She revealed that she took dance and choreography classes in high school to become a dance instructor and choreographer.^[5]

In 2011, at the age of 16, Boom participated in the tenth season of American Idol, though she failed to pass the audition. At the age of 18 she signed her first contract with Warner Chappell Music, going on to release her first two collaborations titled "Money" and "I Won't Let You Down".^[5][6]

Later, she landed deals primarily as a composer and producer for K-pop artists,^[5] where two of the songs that she worked on were picked and released through YG Entertainment, namely "Eyes, Nose, Lips" by Taeyang and "I'm Different" by Hi Suhyun.^[5][7][8] Prior to becoming a K-pop composer and producer, Boom had composed songs for singers such as R. Kelly, Jordin Sparks and Jessica Mauboy.^[5] In 2012 she was connected with Blackpink via YG Entertainment, where she studied Korean with them.^[9] In 2016, Boom became the songwriter and producer for two of Blackpink's debut singles, "Whistle" and "Boombayah", which occupied the #1 chart on World Digital Song Sales and Circle Digital Chart respectively. She later published the demo versions on her social media.^[5][10][11] The next year she worked on Winner's song "Island", which topped the charts.^[5]

In 2020 she became the lyricist and composer for the virtual group K/DA, where she provide the voice of Ahri.^[12] Later that year she released a solo single called "There's No Place Like Home". In March 2021, she released the single "Designer Love", with an accompanying music video being released for the song on Johnson's YouTube channel. In August 2022, she released the single "Anime Eyes".