The Week In Photos - Vote On Your Favourite Pictures

The best pictures of the week are chosen by YOU voting on our interactive slideshow.

Monday's World Earth Day reminded us all of our planet's precious resources as demonstrators campaigned for environmental awareness, including stronger forest and wildlife protection and conservation.

22nd April marked the 20th anniversary of the murder of 18-year-old Stephen Lawrence, with a service attended by Stephen's mother and brother and a host of politicians including David Cameron.

The Queen held 87th birthday celebrations in full military style, meanwhile The Duchess of Cambridge had a busy week as she flashed the cameras her beaming smile and growing baby bump at several locations, along with some wizardry with Wills and Harry at the Harry Potter studios.

Not one US president, but four presidents were photographed on stage together on Thursday as Obama, Clinton and Bush Senior and Junior opened the The Bush Library in Texas.

Plus, spot the mini-alien and the cute porcupine - all in our pics of the week below.

Happy voting and we will announce the winner on Monday morning.

The Week In Photos - Vote On Your Favourite Pictures