How can I get the date of Last Monday of specified week?

declare @dt datetime

set @dt=’1/1/2010′ –Want to know January’s Last Monday Date

SELECT dateadd(d,-datepart(dw,DATEADD(d, -datepart(d,dateadd(mm,1,@dt)),dateadd(mm,1,@dt))-1)+1,DATEADD(d, -datepart(d,dateadd(mm,1,@dt)),dateadd(mm,1,@dt)))