Greg James gives Cymraeg a go!
Nid oes modd chwarae darnau sain a fideo ar eich dyfais

Radio 1's Greg James

1 Mawrth 2017 Diweddarwyd 17:09 GMT

To celebrate St David's Day on 1 March, BBC Cymru Fyw challenged well known TV and radio stars to learn a few words in Welsh. How did Radio 1's Greg James get on?