"Big Brother" star Amber Siyavus' daughter has died from an apparent suicide ... TMZ has learned.
Lexi Tomcavage died Monday night in Ohio, and her death is being investigated as a suicide ... according to the Stark County Medical Examiner. On Sunday, Lexi tweeted 3 times about missing her friend who recently died ... saying "i miss you" and "never been like this before."
Siyavus was a houseguest on Season 8 of 'BB' and was known for her frequent crying. Fans gave her the nickname "Whamber." She finished in 7th place.