Colbie Caillat, Johnny Mathis perform at Seneca Niagara

September will be a month for singer-songwriters at Seneca Niagara Casino & Hotel, as Colbie Caillat and Johnny Mathis are booked to perform inside the 2,400-seat Seneca Niagara Events Center in Niagara Falls. Both shows are set for Saturdays in September at 8 p.m.: Caillat on Sept. 6, and Mathis on Sept. 20.

Caillat will make her first appearance inside Seneca Niagara Events Center. The 29-year-old singer-songwriter burst onto the music scene in 2007 with her debut album "Coco," which featured the No. 1 single "Bubbly" and Top 10 hit "Realize." The following year, she recorded the Grammy Award-winning duet "Lucky" with Jason Mraz. Her follow-up album, "Breakthrough," was nominated for Best Pop Vocal Album and featured the hit single "Fallin' for You." Earlier this month, on June 9, she surprised fans by suddenly releasing a five-track EP called "Gypsy Heart." The lead single, "Try," was recently named an iTunes "Single of the Week."

Tickets for Caillat's performance start at $25 and will go on sale Friday at noon.

Mathis returns to Seneca Niagara Events Center just a little more than a year after a sold-out performance inside the venue. The legendary crooner brought the crowd to its feet and proved that, even in his late 70s, he still has an incredible voice. Mathis is a 2003 Lifetime Achievement Grammy winner and wrote the No. 1 hits "Chances Are" and "Too Much, Too Little, Too Late." Many of his other songs - such as "It's Not for Me to Say," "Misty," "Wonderful! Wonderful!" and dozens of holiday ballads - continue to resonate with audiences young and old.

Tickets start at $35 and are on sale now.

Tickets for all shows will be available at Seneca Casino box offices, www.Ticketmaster.com, all Ticketmaster locations or by phone at 800-745-3000. More information is available by calling 1-877-8-SENECA (1-877-873-6322) or visiting www.SenecaCasinos.com.