Kangana along with actor Shahid Kapoor appeared on the show to promote her upcoming film Rangoon.
Singers Salim Merchant and Shaan, who appear as coaches on the show, started to pull Sugandha's leg and asked her to mimic Kangana in front of her. To that, Kangana said: "I feel like slapping her."
A source from the set said: "It was a nailbiting moment after Kangana's shocking statement. It surely was an awkward moment for Sugandha, but she took it in a sporting spirit and continued with the shoot."
"The Voice India Season 2" is aired on &TV.