Taylor Swift's final night of five sold-out gigs at Los Angeles' Staples Center took place last night - and considering the special guests she's brought on stage over the last few weeks, fans were expecting something pretty big.

However, most people probably weren't expecting a rendition of 'Smelly Cat' – particularly most of her fanbase, who probably weren’t born when 'Friends' was at its peak - but at least she caught them off-guard.

Yes, that's right – Swift was joined by actress Lisa Kudrow, aka Phoebe Buffay from 'Friends', to play 'Smelly Cat':


She was also joined by Justin Timberlake to perform his song 'Mirrors', as well as Selena Gomez:

>

>