Three and a half thousand miles away in New York , Princess Eugenie could be forgiven for thinking that her 25th birthday might pass unnoticed in the UK . But the Queen ’ s granddaughter wasn ’ t reckoning on her father , Prince Andrew , who was determined , literally , to trumpet it from the roof tops . In the middle of a Palace function , Andrew whipped out his iPad and used it to video call his daughter , who currently lives in Manhattan . Scroll down video . Delighted : Princess Eugenie , centre , with her mother Sarah Ferguson , left , and sister Beatrice in Manhattan . All together now : Andrew conducts the 400-strong crowd in a sing a cheery rendition of Happy Birthday . Conference call : The princesses on screen as Prince Andrew video calls his daughter to say Happy Birthday . If that wasn ’ t enough , the prince got his 400-strong audience in the State Apartments at St James ’ s Palace to sing a cheery rendition of Happy Birthday , accompanied by a trumpeter from the Scots Guards . The royal , who was hosting the Pitch @ Palace event for entrepreneurs , introduced the stunned audience to the singalong at St James ’ s Palace , saying : ‘ We are going to do something new this evening . ‘ The lady in the middle is my youngest daughter and it ’ s her 25th birthday today. ’ Laughing Eugenie , wearing a pair of novelty birthday candle glasses to mark the occasion , and accompanied by her sister , Princess Beatrice , and mother , Sarah , Duchess of York , smiled and waved . Andrew told her : ‘ You will notice that we have somebody here to play ( gesturing to the trumpeter ) . ’ He then turned to the lance corporal and added : ‘ If you will lead us in Happy Birthday please ... ’ There were cheers from the crowd as the song came to an end , while plenty of others waved and tried to capture the moment on their camera phones . Trumpeter : Prince Andrew told Eugenie : ‘ You will notice that we have somebody here to play ’ Tech wiz : The royal was hosting the Pitch @ Palace event for entrepreneurs at St James ’ s Palace . Eugenie looked delighted and said she was ‘ very proud , Pops ’ of her father ’ s role in the awards , which celebrate innovation and technology in the creative industries . But the singalong did not impress his ex-wife , who joked - in the style of a Eurovision announcement - that the rendition scored ‘ zero points ’ . Sarah added : ‘ We think you all need to go for choir practice. ’ Andrew , however , was content with the gesture . ‘ Having been told this was a bad idea , it worked , ’ he said . The Prince , who used a Pitch @ Palace event last year to send the first royal selfie , joked : ‘ ’ What was it somebody said about children and dogs ? ’ The social media-savy Royal is also the only senior working royal to have his own personal Twitter account . Eugenie has been in New York for the past year , working for an online auction house . Celebrations : Eugenie , who has been in New York for the past year , and her birthday cake on Instagram . Birthday girl : Eugenie , centre , wearing a pair of novelty birthday candle glasses to mark the occasion .
Princess Eugenie is Three and a half thousand miles away in New York . Her father Prince Andrew video called mid-way through a Palace function . The prince even got everyone at St James ’ s Palace to sing Happy Birthday .