Karina Smirnoff's Medical Drama

"Extra" is breaking the news that "Dancing with the Stars" competitor Karina Smirnoff underwent back surgery this morning -- and "Dancing" fans fear she may not be able to make it to the new season!

Mario Lopez visited a healthy-looking Smirnoff this week and chatted about the new Mario in her life – the R&B singer expected to waltz away with the dance pro this season. Karina exclusively told Lopez the news that she suffered an injury during the recent "DWTS" tour and will have surgery.

Karina is expected to be fully recovered in time for "Dancing’s" March 17 premiere.