Tayla Woodard, from Wadebridge, Cornwall, was in the final year of a multimedia journalism degree course at Bournemouth University.
She died on Sunday after falling ill at a house in Worcester Park, South London, on Saturday evening.
Fellow students have paid tribute to Tayla, pictured, describing her as a “beautiful soul.”
Bournemouth journalism student Nick Reilly said: “Such a tragic loss. Shine on forever. BAMMJ graduates of 2014 will always remember you.”
Student Jessica James added: “Tayla Woodard so glad to have so many lovely memories with you! R.I.P Tay, love and miss you forever and always.”
Tayla wrote regular articles for Bournemouth independent newspaper the Rock and had ambitions to be a showbiz reporter.
She leaves her parents, Julia and Russell, and younger siblings Jodie and Sam.
A police spokesman said: “Police were called by London Ambulance Service at approximately 5:50am on Sunday to reports of a woman taken ill at a residential address in Worcester Park.
“The woman, aged 20, was taken to a south London hospital where she died at 6:22am.
“A post-mortem examination took place on Monday. No cause of death was given and we await the results of further tests.
“The death is being treated as unexplained at this stage.”