In a large bowl, combine first 4 ingredients and beat as directed on cake mix package.
Spoon into greased and floured Bundt pan.
In small bowl, combine all filling ingredients; beat until smooth.
Spoon filling over batter in pan, being careful not to let it touch sides of pan.
Bake 50-55 minutes at 350 degrees. Cool.
Combine all glaze ingredients until smooth; drizzle over cake.