Little League International hosts all star tournaments each year.  The most notable divisions are the 12U all star divisions.  

At LBLL, we have three formal all star teams and a yearly "minors select" team that plays in a round robin tournament with other leagues on the hill.

The other teams are the 10-12 year old division, the 9-11 year old division, and the 8-10 year old division.  The players for those divisions are selected per the process outlined in our governing document, the LBLL Constitution, which states:

"All-star managers and coaches shall be selected and approved by the board of directors in a meeting held during the season.   All-star rosters (including recreational teams such as in minors) shall be selected in the following manner:  The player agent or agents for all players eligible for each team shall create and distribute voting sheets to each official manager and coach that was involved in that player’s division for the spring season.  The player agent shall consult with all managers and coaches regarding their individual opinions at a meeting prior to the selection of the team.  The player agent or agents shall accumulate the votes of all official managers and coaches.  The top 10 players of that vote shall be the first 10 players selected to the team.  The all-star manager shall have the discretion to select any two (or more) players to fill out the roster as they see fit.  All votes shall be held and accumulated confidentially."

Other FAQs about all stars can be found here: https://www.littleleague.org/university/articles/little-league-international-tournament-what-parents-need-to-know/