The 'Born This Way' singer is often pictured with her face covered by a dark mesh - traditionally worn by women who have recently lost their loved ones in many cultures from around the world - which she wears in order to show solidarity with those who are suffering.
She tweeted: ''People ask me why I wear veils. I reply, I'm mourning. Mourning what? Well I figure something sh***y must be going on somewhere.''
Last November, Gaga, 25, launched her own charity for youth empowerment, the Born This Way Foundation.
The eccentric star set up the not-for-profit group - partnered with groups including the John D. and Catherine T. MacArthur Foundation and the Berkman Center for Internet & Society at Harvard University - to help people worldwide develop a new standard of care towards one another.
She said: ''Together we hope to establish a standard of bravery and kindness, as well as a community worldwide that protects and nurtures others in the face of bullying and abandonment.''
Gaga has fronted many campaigns for charity and ethical issues, previously speaking to gay rights campaigners about the repealing of the don't ask, don't tell policy in the US - which didn't allow openly homosexual officers to serve in the armed forces - before its repealing earlier this year.
The 'You and I' singer is currently preparing for the launch of her 'Born This Way Ball' world tour, which starts at the end of next month in Seoul, South Korea.