<Label xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" DataContext="{Binding Blub}" Content="{Binding Path=Blah, StringFormat={}{0} items}">
<FrameworkElement.Style>
<Style />
</FrameworkElement.Style>
</Label>