Question: "Countdown" is a song writtin in part by what New Edition band member?

Context articles: Johnny Gill
Cool It Now
The New Edition Story
Word to the Mutha!
My Secret (Didja Gitit Yet?)
Countdown (Beyoncé song)
Michael Bivins
Hit Me Off
Under the Blue Moon
Lost in Love (New Edition song)

Johnny Gill Jr. (born May 22, 1966), also known as J.G., J. Skillz and Johnny G, is an American singer-songwriter and actor.
 Gill is the sixth and final member of the R&B/pop group New Edition, and was also a member of the supergroup called LSG, with Gerald Levert and Keith Sweat.
 He is currently in the new group Heads of State with New Edition members Bobby Brown and Ralph Tresvant.
"Cool It Now" is a 1984 hit single by American group New Edition, and is the first single from their eponymous second album, "New Edition".
 In the US, the song entered the Hot Black Singles chart on September 1, 1984.
 The song peaked at number 4 in January 1985 on the "Billboard" Hot 100 chart.
The New Edition Story is an American biographical three-part miniseries about the R&B group New Edition, from their rise to fame as a boy band from the Orchard Park Projects of Roxbury, Massachusetts, to becoming a successful adult act.
 It was originally broadcast on BET from January 24 through January 26, 2017, becoming the network's first scripted miniseries.
 All six members of New Edition served as co-producers.
"Word to the Mutha!"
 is a song co-written and performed by American contemporary R&B group Bell Biv DeVoe.
 It originally appeared on their debut studio album "Poison" under the title "Ronnie, Bobby, Ricky, Mike, Ralph and Johnny (Word to the Mutha)!"
, but the title was shortened and a remixed version of the song was issued as the only official single from the group's remix album "" The song features vocals from Bobby Brown, Ralph Tresvant and Johnny Gill; and it was the first recorded song to feature all six members of New Edition; although Brown, Tresvant and Gill are credited separately on the single rather than collectively as New Edition.
"My Secret (Didja Gitit Yet?)"
 is a 1985 song by R&B/pop group New Edition, is the fifth and final single from their eponymous second album, "New Edition".
 Released while "New Edition’s" third single, the better received “Lost In Love,” was still peaking; it didn’t get as much promotion, and subsequently didn’t perform as well as the previous singles from the album.
 Ralph Tresvant sings lead.
"Countdown" is a song recorded by American singer Beyoncé for her fourth studio album, "4" (2011).
 The song was written by Knowles, Terius Nash, Shea Taylor, Ester Dean, Cainon Lamb, Julie Frost, Michael Bivins, Nathan Morris and Wanya Morris, and produced by Beyoncé, Taylor and Lamb.
 The song's conception was brought about by Knowles desiring to mix musical styles of the 1990s with the 1970s.
 It was sent to radio on October 4, 2011 as the fourth single from "4".
Michael Lamont Bivins (born August 10, 1968) is an American singer and rapper, and a founding member of New Edition and Bell Biv DeVoe.
"Hit Me Off" is a 1996 hit single by R&B/pop group New Edition and their first single in seven years.
 The song was the first release off the group's sixth studio album, "Home Again".
 The song featured lead vocals for all six New Edition members.
 The song was a substantial success for the group, debuting at number three on the pop chart and while topping the R&B singles chart for three weeks.
 It sold 600,000 copies domestically and was certified gold by the RIAA.
 It samples "Storm King" by Bob James, "I Got Cha Opin" by Black Moon, and "One Nation Under a Groove" by Funkadelic.
 The song was performed along with "I'm Still in Love with You" on the TV series "Family Matters".
Under the Blue Moon is the fifth studio album by American R&B boy band New Edition by MCA on November 24, 1986.
 Their fourth album and third with MCA and first album after New Edition member Bobby Brown was voted out of the group, the group was going through a transitional phase during this period.
 It is their only album as a quartet.
 The album reached number 43 on the "Billboard" 200, and number 18 on the R&B albums chart.
 It was later certified gold by the Recording Industry Association of America (RIAA).
"Lost in Love" is a 1985 ballad by R&B/pop group New Edition, and is the third single from their eponymous second album, "New Edition".
 Released in early 1985, the song peaked at #35 on the "Billboard" Hot 100 and #6 on Billboard's Hot Black Singles chart.