Pink, who has over 4 million followers on the social networking site, tweeted: 'If there are any animal activists around Malibu-at Leo Cabrillo State beach, there are horses being painted for a stupid music video. Shame.'
'Artists should be more aware and responsible for their actions,' she continued.
After hoards of Selena fans then defended their idol, Pink posted a further message standing by her opinions.
'Whether u r a fan of mine or whomEVER'S, I won't stop speaking out about animal cruelty.'
'I've taken responsibility in the past, so should she.'
However a representative for the record company insists that no animals were harmed during filming.
'It was important to the Production Company, Record Label and Ms. Gomez that no animals were harmed and all proper precautions were taken,' Gomez's spokesperson said in a statement to People magazine.
'A non toxic, vegetable based powder paint was applied via an airbrush and removed with water. An official from the Humane Society was on set supervising.'
Selena filmed a fanciful scenes while on location.
Wearing a flowing strapless floor-length gown and with her dark hair worn long and straight, the former Disney star danced in the surf with a handsome male love interest.
Selena has been hard at work on her new album, When The Sun Goes Down, which comes out next week.
