POTW: Pete Wentz, Lil Wayne, Ke$ha, Justin Bieber
U2's The Edge, Adam Clayton and Bono took a collective leap of faith while performing at ANZ Stadium on Dec. 13 in Sydney, Australia.

For the 15th anniversary earlier this month of Billboard's Adult Pop Songs radio airplay chart, we presented the Top 40 Adult Pop Songs 1996-2011 ranked retrospective.

How about some (very) deep countdown extras?

Here is a look (and listen) at 15 other songs that, despite not having reached the weekly 40-position chart's top half, or crossing over, for the most part, to other formats, still sound deserving of having been bigger hits.

See how many you can remember and add your own suggestions in the comments section below or by e-mailing askbb@billboard.com.

"Four Leaf Clover," Abra Moore
No. 23, 1997

Moore's sole charted format hit coincided with her participation in the original Lilith Fair boom. She later co-wrote the album track "You Get Me" on Michelle Branch's debut set "The Spirit Room."

"Brian Wilson," Barenaked Ladies
No. 37, 1998

Two of BNL's best-known classics stopped at No. 37; "If I Had 1,000,000" peaked at the same spot two years later. Still, two of the group's songs rose to No. 2: "One Week" (1998) and "Pinch Me" (2000).

"Snow on the Sahara," Anggun
No. 22, 1998

The Indonesian singer/songwriter brought her ethereal sounds to U.S. shores with this title cut from her album that also sports a cover of David Bowie's "Life on Mars."

"That I Would Be Good (Live)," Alanis Morissette
No. 24, 2000

Although one of just five of her 15 Adult Pop Songs chart entries to fall short of the top 20, the pensive song remains a fan favorite, especially for Kelly Clarkson, who has covered it in concert.

"Camera One," Josh Joplin Group
No. 22, 2001

"Camera One," which thanks to Joplin's vocals evoked comparisons to R.E.M., enjoyed extra exposure (no pun intended) courtesy of usage in an early episode of "Scrubs."