Related: Last week, Dancing With the Stars fans were shocked to learn that host Brooke Burke-Charvet is battling thyroid cancer . But the fans weren't the only ones surprised by this sad news — the Season 15 All-Stars cast was taken aback as well. Celebuzz spoke to Season 15  partners Apolo Anton Ohno and Karina Smirnoff about the news in a video interview where they convey their distress and disbelief. "She's so sweet, so beautiful, so kind, so supportive to all of us," Karina gushes. "And she's so fit," Apolo adds. "Like you never expect — you know, I mean, cancer affects everybody. It's got no — it doesn't matter. But it's sad." They went on to say Brooke has been looking great on set. "She looks amazing, her energy's amazing," Apolo explains. They both note that there's not much they can do, they want to be there for Brooke in whatever way they can. "More than anything we want to be the smile for her, the laughter," Karina says. "Be that support system for Brooke." Check out the full interview below.