Brooks & Dunn is an American country music duo consisting of Kix Brooks and Ronnie Dunn, both vocalists and songwriters. The duo was founded in 1990 through the suggestion of Tim DuBois. Before the foundation, both members were solo recording artists. Brooks wrote number one singles for John Conlee, Nitty Gritty Dirt Band, and Highway 101; both he and Dunn also charted two solo singles apiece in the 1980s, with Brooks also releasing an album for Capitol Records in 1989.

Their first greatest hits compilation was released on September 16, 1997. It comprised most of their singles to that point and three new songs: "Honky Tonk Truth", "He's Got You", and "Days of Thunder". The first two were released as singles, with respective peaks of three and two on the country charts. The Greatest Hits Collection was certified platinum in April 1998, and double-platinum in 2001.  Brooks & Dunn collaborated with Reba McEntire to perform "If You See Him/If You See Her", which was the lead-off single to Brooks & Dunn's If You See Her and McEntire's If You See Him, both of which were released on the same day. Arista Nashville and MCA Nashville, the label to which McEntire was signed, both promoted the single. This cut went to number one, as did If You See Her's next two singles: "How Long Gone" and a cover of Roger Miller's "Husbands and Wives", which also became the duo's first top 40 hit on the Billboard Hot 100. Dunn recorded the vocals for "Husbands and Wives" in one take. Also included on the album was "Born and Raised in Black and White", the first song of the duo's career in which they alternated on lead vocals. The album's fourth single was "I Can't Get Over You", which was a top five country hit. Following it was "South of Santa Fe", which peaked at number 41 on the country charts and thus became the duo's lowest-peaking single there. In 2001, If You See Her reached double-platinum certification in the United States.  Jana Pendragon, in her review for Allmusic, praised Dunn's vocal performances on "Husbands and Wives" and "You're My Angel", but thought that a couple of the other cuts were "formula". Country Standard Time writer Kevin Oliver criticized the album for having "wildly uneven" material, calling the McEntire collaboration a "snoozer" and "South of Santa Fe" "wretched".

Using a quote from the above article, answer the following question: What was on the greatest hits collection?
It comprised most of their singles to that point and three new songs: "Honky Tonk Truth", "He's Got You", and "Days of Thunder".