Question: What singer's signature song is "At Last", also covered by Tina Moore?

Context paragraphs:
Dancing in the Street: "Dancing in the Street" is a song written by Marvin Gaye, William "Mickey" Stevenson and Ivy Jo Hunter.  It first became popular in 1964 when recorded by Martha and the Vandellas whose version reached No. 2 on the "Billboard" Hot 100 chart and peaked at No. 4 in the UK Singles Chart.  It is one of Motown's signature songs and is the group's premier signature song.  A 1966 cover by the Mamas & the Papas was a minor hit on the Hot 100 reaching No. 73.  In 1982, the rock group Van Halen took their cover of "Dancing in the Street" to No. 38 on the Hot 100 chart and No. 15 in Canada on the "RPM" chart.  A 1985 duet cover by David Bowie and Mick Jagger charted at No. 1 in the UK and reached No. 7 in the US.  The song was also covered by The Kinks, The Everly Brothers, Grateful Dead and Black Oak Arkansas.

Tina Moore (album): Tina Moore is the debut album by American R&B singer Tina Moore, originally released in 1995.  The album was released in Europe in 1997 with two extra tracks, including the UK garage version of "Never Gonna Let You Go", which reached number 7 in the UK Singles Chart.  The album also features a cover of "At Last", the signature song of Etta James.

I Don't Need No Doctor: "I Don't Need No Doctor" is an R&B song written by Nick Ashford, Valerie Simpson, and Jo Armstead, first recorded by Ray Charles in 1966.  Over the years, it has been covered by bands such as garage rock band The Chocolate Watchband in 1969, Humble Pie in 1971, New Riders of the Purple Sage in 1972, metal band W.A.S.P. in 1986, by metal band Great White in 1987, and by the garage punk band The Nomads in 1989.  Styx also covered this song.  Humble Pie's version became an FM radio hit and reached #73 on the "Billboard" Hot 100 singles chart.  In 2007, John Mayer also covered the song in his live album, "Where the light is" in Los Angeles.

I'm Not So Tough: I'm Not So Tough is the third album by American country music singer Mindy McCready.  It was released on BNA Records in 1999.  This album peaked at #17 on the US country charts and sold 144,000 copies.  The album included the single "All I Want Is Everything".  The track "Thunder and Roses" was later covered by Pam Tillis on her 2001 album of the same name.  "Take Me Apart" was also covered by Tina Arena in 2004.  The album was issued in the United Kingdom with three bonus tracks, including the single "One in a Million".  The song "I'm Not So Tough" was a cover of the debut single of Dutch singer Ilse DeLange, recorded in 1998.

Etta James: Etta James (born Jamesetta Hawkins; January 25, 1938 – January 20, 2012) was an American singer who performed in various genres, including blues, R&B, soul, rock and roll, jazz and gospel.  Starting her career in 1954, she gained fame with hits such as "The Wallflower", "At Last", "Tell Mama", "Something's Got a Hold on Me", and "I'd Rather Go Blind".  She faced a number of personal problems, including heroin addiction, severe physical abuse, and incarceration, before making a musical comeback in the late 1980s with the album "Seven Year Itch".

Parisienne Walkways: "Parisienne Walkways" is a song by guitarist Gary Moore that reached number 8 in the UK Singles Chart in May 1979.  The song is featured on Moore's album "Back on the Streets" and features a vocal from Thin Lizzy frontman, Phil Lynott, who co-wrote the song with Moore.  Lynott also played bass guitar on the track, alongside Thin Lizzy drummer Brian Downey, thus reuniting the short-lived 1974 Thin Lizzy line-up which had recorded "Still in Love with You" and the single "Little Darling".  The melody of "Parisienne Walkways" is based on the jazz standard "Blue Bossa" by Kenny Dorham.  It was Gary Moore's signature song.

Nobody Better: "Nobody Better" is a single by American singer Tina Moore.  The original version of the song appears on her 1995 self-titled debut album, "Tina Moore".  Like her previous single "Never Gonna Let You Go", a 2-step garage mix by Kelly G was released on the Delirious label in 1997.  It was a Top 20 hit in the UK, peaking at #20 on the UK Singles Chart in early 1998.  Single formats also include another garage remix by Dem 2, 'Dem 2's Luv Unlimited Mix', and an R&B remix by Blacksmith.

List of signature songs: A signature song is the one song (or, in some cases, one of a few songs) that a popular and well-established recording artist or band is most closely identified with or best known for, even if they have had success with a variety of other songs.  There have also been instances where a film actor has acquired a signature song by giving a popular vocal performance in a feature.  Signature songs can be the result of spontaneous public identification, or a marketing tool developed by the music industry to promote artists, sell their recordings, and develop a fan base.

Never Gonna Let You Go (Tina Moore song): "Never Gonna Let You Go" is a single by American singer Tina Moore.

I Know (You Don't Love Me No More): "I Know (You Don't Love Me No More)" is a R&B song written and performed by American singer Barbara George.  It was released as her debut single in late 1961.  This song became her signature song and her only major hit in United States, peaking at number 1 in the "Billboard" R&B singles chart and number 3 in the Pop Singles chart.  The song was later covered by The Newbeats, Cher, Ike & Tina Turner, Bonnie Raitt, Anne Murray, Steve Marriott, Yvonne Fair, Felder's Orioles, and also a Spanish language version by Marisela was released in 1988.  The Shirelles borrowed the melody of "I Know" for their 1963 cover of "Everybody Loves A Lover".

Supporting paragraphs: Tina Moore (album) Etta James
Answer: Etta James