Image animation

[AndyCvr]

Hi guys,
i've a question for you.
I want to animate an image contained in a "LongListSelector" like Pictures hub tile or "search" tile in Wikipedia (unofficial) app.
How can i do that?

Here's the xaml:

<phone:LongListSelector x:Name="HomeList" Margin="0,0,-12,0" ItemsSource="{Binding HomeItems}">
   <phone:LongListSelector.ItemTemplate>
         <DataTemplate>
            <StackPanel Tap="HomeStackPanel_Tap">
               <Grid Width="430" Height="150" Margin="0,0,0,10">
                  <Image Source="{Binding Source}" Stretch="UniformToFill" />
                  <StackPanel Width="430" Height="30" VerticalAlignment="Bottom" Background="#99000000">
                     <TextBlock FontFamily="Segoe WP Light" FontSize="22" FontWeight="Black" HorizontalAlignment="Right" Text="{Binding Text}"/>
                  </StackPanel>
               </Grid>
            </StackPanel>
         </DataTemplate>
      </phone:LongListSelector.ItemTemplate>
   </phone:LongListSelector>