Rock legend Ozzy Osbourne’s death at age 76 — less than three weeks after delivering a stirring farewell concert with his Black Sabbath bandmates — has left friends and family fearing for his reeling widow,

Vulnerable' Sharon Osbourne has been supported by her family and friends after the death of her husband Ozzy Osbourne, who tragically passed away aged 76 on July 22

A source tells PEOPLE that Sharon Osbourne is "heartbroken" by husband Ozzy Osbourne's death. They add that the TV personality has found "a lot of comfort" from the "family time" they spent together before her late husband died on July 22.