Learning Japanese the easy way - just ad an U and you'll be fine:
English - Japanese
Microphone - maiku
Desert - dezato
Receipt - risitto
Message - meseji
Bike- baiku
Nightingale - naichingeru
Gum - gamu
Cassette - mc kasettu-tepu
Celebrity - serebu
Festival - fesutibaru
television - terebi
Carnival - kanibaru
well, I forgot the romantic part:
kiss - kisu
couple - kappuru
love-letter - rabu-reta