Question: Units in the City is the debut and only studio album by which American hip hop recording artist, an American rapper from Atlanta, Georgia, known professionally as who?

Context paragraphs:
Bitch, Don't Kill My Vibe: "Bitch, Don't Kill My Vibe" (edited for radio as "Trick, Don't Kill My Vibe" or simply "Don't Kill My Vibe"), is a song by American hip hop recording artist Kendrick Lamar, from his major-label debut studio album "Good Kid, M.A.A.D City" (2012).  The song, produced by frequent collaborator Sounwave of Top Dawg Entertainment in-house production team Digi+Phonics, heavily samples "Tiden Flyver", by Danish electronic group Boom Clap Bachelors.  It was originally intended to be a collaboration with American singer Lady Gaga, but her contributions were ultimately excluded from the final recording due to timing issues.  A remix of "Bitch, Don't Kill My Vibe" featuring American rapper Jay-Z was sent to radio as the album's fifth single on March 21, 2013, with the original version and another remix featuring British recording artist Emeli Sandé later being released.

Shoulder Lean: "Shoulder Lean" is a song by American hip hop recording artist Young Dro, released July 4, 2006 as his debut single and the lead single from his debut studio album "Best Thang Smokin'".  The song features Dro's fellow American rapper and Grand Hustle label-boss T.I. on the hook.  The production was handled by Grand Hustle in-house producer Cordale "Lil' C" Quinn.  The song was a massive hit in the United States, reaching the Top 10 on the "Billboard" Hot 100 and at number one on the Hot R&B/Hip Hop Songs chart.  This was Young Dro's first and only Top 10 single and T.I.'s fourth Top 10 single.  The song received heavy airplay and was certified 2x Platinum by RIAA.

Ralo (rapper): Terrell Davis, known professionally as Ralo, is an American hip hop recording artist from Atlanta, Georgia.  He is signed to rapper Young Scooter's Black Migo Gang, Gucci Mane 1017 Records via Interscope Records and his own label Famerica Records.  Ralo gained recognition following the release of his single, "Can't Lie" featuring rapper Future, which was released in 2015. " Spin" magazine placed the song at number 65 on its "Every Future Song of 2015, Ranked" list.  In 2015 Ralo released the mixtapes "Famerican Gangster" and "Diary of the Streets".

Shawty Lo discography: The discography of Shawty Lo, an American hip hop recording artist from Atlanta, Georgia.  Shawty Lo embarked on his career with the Southern hip hop group D4L.  The discography consists of one studio album, one posthumous album, 15 mixtapes and 20 singles (including 12 as a featured artist).

McGruff (rapper): Herbert Brown, better known by his stage name McGruff (also known as Herb McGruff) is an American Hip hop recording artist from Harlem, New York City, New York.  Brown started rapping in his early teens.  He embarked on his music career in the hip hop group Bronx Most Wanted, alongside rappers Jay Q and Tee U.B. Brown later became a member of the hip hop collective Children of the Corn.  As a member of Children of the Corn, Brown worked alongside Big L, Cam'ron, Bloodshed and Mase, all of whom would go on to have successful careers in the music industry.  After the group disbanded without releasing any material, Brown made his first appearance on Big L's debut album, "Lifestylez ov da Poor & Dangerous" (1995), on the tracks "8 Iz Enuff" and "Dangerzone".  Eventually, Brown signed a deal with popular hip hop label, Uptown Records and began recording his debut album, "Destined to Be".  In early 1998, the album's lead single "Before We Start" became a minor hit, charting on several "Billboard" charts.  In the Summer of 1998, "Destined to Be" was released but failed to sell many copies, only peaking at 169 on the "Billboard" 200, and Brown was released from his contract.  Brown would make appearances with Heavy D on his album, "Waterbed Hev" and the "Woo" soundtrack.  In 2009, Brown appeared on Mase's mixtape "I Do the Impossible".  In 2010, he was featured heavily on The Diplomats mixtape, "The D.I.P. Agenda."  In 2014, DJ Kay Slay, enlisted Brown, along with Raekwon, Fat Joe, Ghostface Killah, Sheek Louch, N.O.R.E., Lil' Fame, Prodigy and Rell, for a song titled "90s Flow".

Shawty Lo: Carlos Rico Walker (March 22, 1976 – September 21, 2016), known professionally as Shawty Lo, was an American rapper from Atlanta, Georgia.  Walker was a founding member of the Southern hip hop group D4L and in 2003, founded D4L Records.  He was best known for his solo debut single "Dey Know", which was included on his solo debut album "Units in the City", released in February 2008.  In June 2011, Walker announced he had signed his D4L imprint to fellow American rapper 50 Cent's subsidiary label G-Unit South Records, in a joint venture deal.

Gunplay (rapper): Richard Morales, Jr. (born July 18, 1979), better known by his stage name Gunplay, is an American hip hop recording artist from Carol City, Florida.  He embarked on his career in hip hop, as a member of fellow Florida-based rapper Rick Ross's southern hip hop group, Triple C's.  Triple C's released their debut album, "Custom Cars & Cycles", in 2009.  After signing to Ross's Maybach Music Group label, upon its inception in 2009, Gunplay would announce he secured a solo recording contract with Def Jam Recordings, in July 2012.  He released several mixtapes, such as "601 & Snort".  His debut studio album, titled "Living Legend", was released on July 31, 2015.

Units in the City: Units in the City is the debut and only studio album by American hip hop recording artist Shawty Lo.  It was released on February 26, 2008, by Warner Bros.  Records, Asylum Records and D4L Records.  The album features guest appearances from Phace Baity, Gucci Mane and G-Child, with the production, which was provided by Balis Beats, DJ Montay and DJ Pooh, among others.

HeadBand: "HeadBand" is a song by American hip hop recording artist B.o.B.  It was released on May 21, 2013, as the lead single from his third studio album, "Underground Luxury" (2013).  The song, produced by American hip hop record producer DJ Mustard, features a guest appearance from fellow American rapper 2 Chainz.  The song has since peaked at number 53 on the Billboard Hot 100.

Lil Wayne: Dwayne Michael Carter, Jr. (born September 27, 1982), known professionally as Lil Wayne, is an American hip hop recording artist.  In 1991, at the age of nine, Lil Wayne joined Cash Money Records as the youngest member of the label, and half of the duo The B.G.'z, alongside fellow New Orleans-based rapper Lil' Doogie.  In 1996, Lil Wayne joined the southern hip hop group Hot Boys, with his Cash Money label-mates Juvenile, Young Turk and Lil' Doogie (who now goes by B.G.).  Hot Boys debuted with "Get It How U Live! ", that same year.  Most of the group's success came with their platinum-selling album "Guerrilla Warfare" (1999) and the 1999 single "Bling Bling".  Along with being the flagship artist of Cash Money Records, Lil Wayne is also the Chief Executive Officer (CEO) of his own label imprint, Young Money Entertainment, which he founded in 2005.

Supporting paragraphs: Units in the City Shawty Lo
Answer: Shawty Lo