Say it isn't so!

NEW YORK (Billboard) - Barry Manilow is in a mellow mood on "The Greatest Songs of the Seventies," his third volume of decade-driven covers albums.

Due September 18 via Arista, the project will be available as an 18-track single-disc set and as a two-disc set with a 14-song Dual Disc (CD/DVD) and a nine-song bonus audio CD.

For the single-disc package, Manilow focuses on contemplative fare such as Simon & Garfunkel's "Bridge Over Troubled Water," Carole King's "You've Got a Friend" (a duet with Melissa Manchester), the Carpenters' "(They Long To Be) Close To You" and Barbra Streisand's "The Way We Were." Rosie O'Donnell is featured on an interpretation of Elton John's "Don't Go Breaking My Heart."

This version will be rounded out by acoustic versions of eight vintage Manilow tracks, including "Mandy," "Could It Be Magic?," "Copacabana" and "Somewhere in the Night."

Manilow's two previous "Greatest Songs" albums have sold nearly 1.7 million copies in the United States combined, according to Nielsen SoundScan.

Here is the tentative track listing for "The Greatest Songs of the Seventies":

"The Way We Were"

"It Never Rains in Southern California"

"My Eyes Adored You"  Continued...