177-lbs Streisand - Diet Or Die!

Frantic over her failing marriage and severe health issues, Barbara Streisand is looking like a rumpled, tubby bag lady - and pals fear the "Funny Girl" is eating herself to death!

The 74-year-old diva was recently spotted bumming around Beverly Hills without makeup - or a bra - looking 50 pounds heavier!

Friends are terrified she's turned to comfort foods to cope with her emotional issues.

See photos of Streisand's recent weight in this latest issue of GLOBE - at your nearest newstand or supermarket!