Aleksandar "Aki" Rahimovski (Macedonian: Александар "Аки" Рахимовски; 5 June 1955 – 22 January 2022) was a Croatian and Yugoslav rock musician. Best known as the vocalist of the highly popular band Parni Valjak, Rahimovski is widely considered one of the most prominent vocalists and frontmans of the Yugoslav rock scene.

Rahimovski started his musical career as a teenager, as keyboardist and vocalist for several Macedonian bands, before joining Zagreb-based Parni Valjak in 1975. With Parni Valjak he achieved large success in the second half of the 1970s and nationwide popularity in the 1980s, the band managing to maintain their popularity in all former Yugoslav republics after the dissolution of the country. With Parni Valjak, Rahimovski had released 18 studio albums, 5 solo albums, 5 video albums and a number of 7-inch singles. He had been the band's vocalist until his death in 2022. In addition to working with Parni Valjak, Rahimovski had a short-lasting solo career between the band's disbandment in 2005 and reunion in 2009, releasing one solo album.

Born into a Torbeši family, in Niš on 5 June 1955, but moved with his family to Skopje at an early age. His father was a music teacher, and at the age of seven Rahimovski enrolled in a music school, attending classes in piano and singing.

As a teeneager, Rahimovski was a DJ, before becoming the organist for the band Krvna Braća (Blood Brothers). From Krvna Braća he moved to the band Vakum (Vacuum), and eventually became the vocalist for the band Tor (Thor) when he was 16. With Tor, he performed on the 1975 edition of BOOM Festival held in Zagreb, where he was spotted by manager Vladimir Mihaljek and suggested to guitarists Husein Hasanefendić and Jurica Pađen, who were aspiring to form a new band after they left Grupa 220.

Rahimovski was among the forming members of Parni Valjak, alongside Husein Hasanefendić (guitar), Jurica Pađen (guitar), bass guitarist Zlatko Miksić "Fuma" and drummer Srećko Antonioli. During the following decades, Rahimovski and Hasanefendić would remain the key figures and the only two mainstay members of the band. Immediately attracting the attention of the public with their energetic live performances and boogie rock sound, the band gained popularity with their early studio albums, Dođite na show! (Come to the Show!) and Glavom kroz zid (Head Against the Wall). After a brief attempt to break into foreign market with an English language album released under the name Steam Roller, the band joined in on the Yugoslav new wave scene with the 1980 album Vruće igre (Hot Games), which launched them to the top of the Yugoslav rock scene. With their following releases the band made a shift towards mainstream rock sound, scoring a large number of hits and remaining one of the most popular Yugoslav rock acts until the country's dissolution. They maintained large popularity in Croatia during the early 1990s, also restoring their popularity in other former Yugoslav republics in the following years and decades. In 2005, the group announced their disbandment, only to reunite in 2009, continuing to sell out large venues in former Yugoslav region. Rahimovski was the band's vocalist until his death in 2022, recording 18 studio albums, 5 live albums, 5 video albums and a number of 7-inch singles with the group.

After Parni Valjak disbanded in 2005, Rahimovski started a short-lasting solo career. In 2007, he released his only solo album U vremenu izgubljenih (In the Time of the Lost). Most of the songs on the album were written by Rahimovski's former bandmate from Parni Valjak, drummer Dražen Šolc. The album also featured songs authored by Oleg Colnago and another former Parni Valjak member, keyboardist Berislav Blažević. The album was released with a multimedia bonus CD, featuring music videos and the songs Rahimovski had recorded with other artists: Karolina Gočeva, Zoran Predin, Leilani Marchall, Šank Rock, Zagrebački Solisti, and others.

In 1985, Rahimovski, alongside Hasanefendić, took part in the YU Rock Misija project, a Yugoslav contribution to Live Aid, contributing vocals to the song "Za milion godina". In 2002, with Mladen Vojičić "Tifa", Dado Topić and Zlatan Fazlić he recorded Fazlić's song "Pjesma za Davora" ("A Song for Davor"), recorded as a tribute to deceased Indexi vocalist Davorin Popović. In 2010, he recorded the song "Kasno je za sve" ("It's Late for Everything") for Toše Proeski tribute album Još uvek sanjam da smo zajedno (I'm Still Dreaming We're Together).

During his career, Rahimovski made a number of guest appearances as guest vocalist on albums by other artists. In 1999, he appeared as guest vocalist on the album 16 nam je godina tek – Koncert (We're Only 16 – Concert) by Croatian and Yugoslav country music band Plava Trava Zaborava, in the cover of Parni Valjak song "Godine prolaze" ("Years Are Passing"), in the cover of Eric Clapton song "Wonderful Tonight" and in the cover of the song "Love Hurts". In 2007, Rahimovski made a series of guest appearances: he appeared as guest on Zoran Predin's album Za šaku ljubavi (For a Handful of Love), in the song "Vilenjak" ("Elf"); on Šank Rock album Senca sebe (Shadow of Myself), in the song "Pesem" ("A Song"); on Neverne Bebe album Iza oblaka (Beyond the Clouds), in the song "Boje duge" ("Colors of the Rainbow"); together with Hasanefendić on Vanna album Ledeno doba (Ice Age), in the cover of Parni Valjak song "Stranica dnevnika" ("A Page from a Diary"). In 2010, he made a guest appearance on Garo & Tavitjan Brothers album Makedonsko srce kuca u 7/8 (Macedonian Heart Beats in the 7/8 Rhythm), recording the vocals for the cover of the traditional song "Snošti sakav da ti dojdam" ("Last Night I Wanted to Come to You"). In 2019, he made a guest appearance on Tihomir Pop Asanović's album Povratak Prvoj Ljubavi / Return To The First Love, in the new version of the song "Domovino moja" ("My Homeland"), originally recorded by Asanović's former band September.