Kes (commonly known as Kes the Band or KTB) is a Trinidadian soca group formed in 2005, known for their eclectic mix of R&B, Pop, Rock, Soca, EDM and reggae. The band originally comprised brothers Kees Dieffenthaller on lead vocals, drummer Hans Dieffenthaller, rhythm guitarist Jon Dieffenthaller along with friend Riad Boochoon on bass guitar. Hans was eventually replaced by Dean James with keyboardist Mario Callender and DJ Robbie Persaud appearing as supporting members. Since the band inception, they've been elevated to mainstream popularity locally and throughout the Caribbean diaspora.

In 2011, Kees was crowned T&T's International Groovy Soca Monarch The band's hit tune "Wotless" was also nominated for a 2011 BET Soul Train Music Award in the category of best Caribbean Performance. Another hit single called Hello, released in 2017, has since earned the most digital streams of any soca song in the last decade. Kes teamed up with Iwer George to win both the 2020 T&T International Soca Monarch and Road March titles. The band has also collaborated with artistes such as Joss Stone, Shaggy, Busy Signal, Shenseea, Snoop Dogg, Major Lazer and Tesanne Chin.

Kes the Band has released ten albums to date, Three Baldheads and a Dread, Lion, On in 5, Wotless, Stereotype, Wired, MadMen Productions Presents: Kes, Windows to the World, We Home, and Man With No Door.

Born to Deanna, a classical trained opera singer and accountant George “Bunny” Dieffenthaller, oldest son Hans began playing the drums at the age of 10. With younger brother Jon as bass player, both sought to form a garage band. When they got ahold of enough musicians, they eventually choose Kes as the band's lead singer. Performances were usually held on a stage that was built in the backyard of the Dieffenthaller home. Though the band waned off, the siblings' musical talents continued to blossom. As time went by Kes became a member of numerous choirs, theatre productions and other musical projects. At the age of 13, Kees formed an R&B group called KLAS, comprising former T&T Miss Universe Faye Alibocus, schoolmates Michael Zephyrine and Marc Alexander.

Hans, Jon and Kees eventually attended Presentation College, San Fernando. At the college they met Riad Boochoon, a classically trained pianist who shared a mutual interest in music. Riad then and there began a longstanding relationship with the Dieffenthaller brothers. The foursome later formed the core of pop/rock outfits Limestone and Rydimorai.

In 2006, Kes launched their debut album titled Three Baldheads and a Dread (a reference to the hairstyles of the band members). This album featured tracks such as "Stay with Me" and "Heads High". The track, "The Calling" was featured on the soundtrack of EA Sports' FIFA 06.

Kes released their second album, Lion, in 2007. The title song was popular among fans due to its inspiring and motivational lyrics. "My Land" a collaboration with Nadia Batson was a hit during the carnival season that year. "My Land" placed Kes and Nadia second in the Trinidad and Tobago International Soca Monarch Competition. Kes released other tracks such as "Our Prayer", and reggae-influenced songs "Limin" and "Bigger Brighter Day" from this album which received heavy rotation on local radio stations. Later in 2007, Kes released tracks that were more diverse, such as "Come a Little Closer" which also dominated local radio stations. In 2008, Kes' carnival releases included "Right Dey" and "De Remedy". Kes also released their music video for the single "Lion" in May.

Bandleader Kees Dieffenthaller composed with noted songwriter Desmond Child, a song on American Idol alum Ace Young's 2008 studio album.