Thaddis "Kuk" Harrell is an American songwriter, vocal producer, arranger and engineer. He is managed by RedZone Entertainment, and is a member of a songwriting–production team composed of himself, Christopher "Tricky" Stewart and Terius "The Dream" Nash. In 2011, Kuk Harrell and partner Tricky Stewart joined the ranks of Fox's American Idol along with music mogul Jimmy Iovine, producing many of the songs performed on television by the contestants and released via iTunes. 2011 marked the highly-anticipated return of Jennifer Lopez and her album LOVE? in which Kuk served as Album Vocal Producer. Earning his fourth Grammy for the vocal production of Rihanna's #1 Billboard Single "Only Girl In The World", Harrell is also the vocal producer and co-writer of Rihanna's Grammy-winning single "Umbrella". A composer and engineer on Beyonce's chart topping "Single Ladies (Put A Ring On It)" from the album I Am... Sasha Fierce, he is also vocal producer and engineer of the Diane Warren-penned "I Was Here" from Beyonce's 2011 album 4. He also produced the majority of the vocals on Mary J. Blige's Platinum album Growing Pains, which recently won a Grammy for "Best Contemporary R&B Album", 2008. The first single from Growing Pains, "Just Fine", earned a Grammy nomination for best R&B vocal performance in 2007.

Nikki Hayes (born Eimear O' Keeffe on 7 May 1979) is a DJ on Spin 1038. She previously presented The All-Request Lunch on RTÉ 2fm. Hayes has also DJed in numerous clubs across Ireland. Hayes was strongly linked with Dundrum Town Centre and broadcasted from there regularly. In November 2010 Hayes took over Spin Hits on Spin 1038.

Hayes joined RTÉ 2fm from Spin 1038 in November 2003 after a career of pirating. She obtained a show of her own during the weekends. Then, when Rick O'Shea moved along to present the now defunct The Rick & Ruth Breakfast Show, Hayes replaced him and in doing so was given her own weekday show which was broadcast from Monday until Thursday from 20:00 until 22:00. In March 2007, she moved to a weekday show broadcast from 12:00 midday until 14:00. The All-Request Lunch show featured Hayes presenting all alone with listeners sending in requests by text, phone and the networking site, Bebo. In August 2007 it was reported that she had increased her listenership by 11,000. In December 2009 it was announced that Hayes was moving to a weekend slot as part of a schedule shake-up at the radio station. Mid August 2010, Nikki parted company with RTÉ after another major schedule shake up. On October 20 it was announced Nikki would start a new show in a weekday morning time-slot on Spin 1038.