Lord Est, or Tuomo Hiironmäki, is a singer-songwriter from Lempäälä, Finland. Lord Est's music is influenced by Caribbean dancehall, reggae and soca. His most famous songs are Reggarekka, Hellä Ori and his feature on Petri Nygård’s Selvä Päivä. Lord Est has found success with his collaborative projects with Mariska, Cheek, Robin Packalen, Mikael Gabriel, Spekti, MEGA-Ertsi, Raappana and Meiju Suvas.

Tuomo Hiironmäki started in the 1990s as a rapper and a part of Finnish hiphop group Ghetto Blasta. His stage name comes from his graffiti tag, which was "Est". The title Lord was invented by his friend from Ghetto Blasta, Big Jay. Ghetto Blasta broke up and Lord Est became more interested in new dancehall trend by Radio Mafia's late-night show Roots & Culture, hosted by Tero Kaski. After spending a couple of years in UK, he came up with the idea of doing dancehall in Finnish. Lord Est started doing music with his brother Uncle Tan. In general, Tuomo wrote the lyrics and Uncle Tan composed the music. Uncle Tan also played keyboard on Lord Est's live band until 2013.

Lord Est's debut single "Viskit ja rommit" had some airplay on Radio Mafia and became a minor hit in summer 2001. In the year 2002 Lord Est released their debut album called Aatelinen. In 2005 Lord Est released Päivät töissä with singles "Hellä ori" and "Heristä nyrkkii". 3rd album Tulin teitä muistuttaan was released in 2008 and was produced by DJ Control of Beats & Styles. It included singles "Sä teet" and "Sun vieres on lämmin". 4th album Se on päätetty was released in 2009 and singles "Nyt saa juhlia taas" and Tänään räjähtää.