An emotional Celine Dion told ABC News that her husband Rene Angelil is on a feeding tube because of his throat cancer -- watch a clip from her upcoming interview. Credit: Lester Cohen/WireImage.com

An emotional Celine Dion told ABC News in a new interview set to air Wednesday, Mar. 25, that her husband Rene Angelil has to eat through a feeding tube due to his ongoing battle with throat cancer.

The superstar's rep confirmed to Us Weekly several weeks ago that Dion will be returning to Las Vegas to continue her residency. Her journey back to Caesars Palace, however, has been incredibly difficult given her husband's deteriorating health condition.

A video preview from her sit-down chat featured the singing sensation wiping away tears and opening up about her choice to put her career on hold.

"Oh, come on," Dion, 46, told ABC News' Deborah Roberts. "The fans, they know that I'm an open book. I sing. That's the only thing I know."

She then detailed Angelil's painful battle with throat cancer. "He can't use his mouth," Dion revealed. "He can’t eat, so I feed him. He’s got a feeding tube. I have to feed him three times a day. I do this myself, and so I feed my husband and feed my kids."

Dion and Angelil, 73, married in 1994, and share three sons together: Rene-Charles, 14, and twins Eddy and Nelson, 4. Angelil was first diagnosed with cancer in 1999, and underwent a procedure in December 2013 to remove a tumor from his throat.

"We are taking life one day at a time," Dion told ABC News. "[But] we are choosing to live."

The "Heart Will Go On" singer's last performance at The Colosseum at Caesars Palace was in July 2014. At the time, Dion was struggling with an illness that caused her throat muscles to inflame. Following her personal health scare, the five-time Grammy winner told fans she was postponing her career "indefinitely" to tend to Angelil.

She will return to Vegas in late August to resume her residency. Watch a preview video from her interview above.