Lindsay Lohan won't be flying solo in Hollywood after she gets out of rehab, if mom Dina has any say.

"She will definitely start back at home with all of us," Dina told the New York Daily News.

Dina is planning to throw her errant daughter a belated "pool party" to celebrate her birthday -- the Mean Girls star turned 27 July 2. Dina said that on that day, LiLo had a quiet birthday "with all the kids at rehab"