Question: "Puppy Love" is a hit track that featured LL Cool J's samples as well as mainstream R&B group Jagged Edge; who headlined the song's vocal?

Context paragraphs:
Where the Party At: "Where the Party At" is a 2001 R&B song by American R&B group Jagged Edge, with guest vocals by American hip-hop artist Nelly.  A number-one single, the song spent three weeks at number-one on the U.S. R&B chart, and was the group's highest-charting single on the U.S. "Billboard" Hot 100, spending five weeks at number three starting the week of September 15, 2001, stuck behind Alicia Keys' "Fallin'" and Jennifer Lopez's "I'm Real (Murder Remix)".

Let's Get Married (song): "Let's Get Married" is a song performed by American contemporary R&B group Jagged Edge, from their album "J.E. Heartbreak".  It spent three weeks at the top of the US R&B chart in 2000 and reached #11 on the US pop chart.  The song is a slow, love ballad about a man's desire to get married to his love interest.

A Jagged Era: A Jagged Era is the debut album by American R&B group Jagged Edge, which was released on October 21, 1997 (see 1997 in music).  The album peaked at a disappointing #104 on the "Billboard" 200, while it peaked at #19 on Billboard's Top R&B/Hip-Hop Albums and #1 on Billboard's Heatseekers Chart.  Originally, the album was due to release the album in December that year.

Jagged Edge (Jagged Edge album): Jagged Edge is the fifth studio album by American R&B group Jagged Edge, released in 2006 (see 2006 in music).  It debuted at number 4 on the "Billboard" 200 with first-week sales of 115,000 copies in the US.

Jagged Little Thrill: Jagged Little Thrill is the third studio album by American R&B group Jagged Edge.  The album was released on June 26, 2001 in the United States.  The album's name is a spin on Alanis Morissette's album, "Jagged Little Pill".

Promise (Jagged Edge song): "Promise" is a song by R&B group Jagged Edge.  The song spent two weeks at number one on the U.S. R&B chart and peaked at number nine on the U.S. Pop chart.  It was number 7 on the Rhythmic Top 40.

He Can't Love U: "He Can't Love U" is a song performed by American contemporary R&B group Jagged Edge, issued as the second single from their second studio album "J.E. Heartbreak".  Co-written by group members Brian and Brandon Casey, the song peaked at #15 on the "Billboard" Hot 100 in 1999.

Puppy Love (Bow Wow song): "Puppy Love" is the third single by rapper Lil' Bow Wow's debut album "Beware of Dog" (2000).  The song was written by Brian-Michael Cox Brian Casey, Brandon Casey and Jermaine Dupri and features R&B group Jagged Edge and samples the beat of LL Cool J's song "Kanday" from his album "Bigger and Deffer".  The music video premiered on June 19, 2001, and features Solange Knowles as the rapper's love interest.

Jagged Edge (group): Jagged Edge is an American mainstream R&B group signed through Jermaine Dupri's So So Def Recordings.  The group has had a number of hit singles, many of which are produced by Dupri.  The group's members include identical twin lead singers Brandon and Brian Casey as well as Kyle Norman and Richard Wingo.  In addition to writing the bulk of the group's material, the Casey brothers have also written for Usher, Nivea and Toni Braxton.

The Remedy (Jagged Edge album): The Remedy is the seventh studio album by American R&B group Jagged Edge.  It was released on June 21, 2011.  The new project boasts a mix of the old and new; Jagged Edge’s sexy R&B sound and contemporary beats by producers such as Casey Boyz (Brandon & Brian Casey), Cool & Dre, Cainon Lamb, Mad Skrews, Adam Ledgister, Bigg D and Jim Jonsin.  The album debuted at number 35 on the "Billboard" 200 with 12,400 copies sold in the first week.

Supporting paragraphs: Puppy Love (Bow Wow song) Jagged Edge (group)
Answer: Lil' Bow Wow