WPF DataGrid MouseOver on DataGridRow

I can't figure out why the first part of code isn't working, but the second is.

PART 1

    <DataGrid.RowStyle>
        <Style TargetType="DataGridRow">
             <Style.Triggers>
                  <Trigger Property="IsMouseOver"
                           Value="True">
                       <Setter Property="Background"
                               Value="Green" />
                  </Trigger>
             </Style.Triggers>
        </Style>
    </DataGrid.RowStyle>

PART 2

    <DataGrid.CellStyle>
        <Style TargetType="DataGridCell">
            <Style.Triggers>
                <Trigger Property="IsMouseOver"
                         Value="True">
                    <Setter Property="Background"
                            Value="Pink" />
                </Trigger>
             </Style.Triggers>
        </Style>
    </DataGrid.CellStyle>

Basically, all I want to do is set the MouseOver color on a row...