Kee-eh-rehs bah-ee-lar
Here's a breakdown:
* Kee: The "ie" sounds like the "ee" in "see"
* Rehs: The "r" is rolled, similar to a Spanish "r"
* Bah: The "a" sounds like the "a" in "father"
* ee: The "i" sounds like the "ee" in "see"
* lar: The "l" is a soft "l" similar to the English "l"
The emphasis is on the first syllable: Kee-rehs bailar.