Update:

Added the video of the record breaking round below... 

Wow. 28 homers by Josh Hamilton. 4 more than the previous record of 24 by Bobby Abreu. Hamilton didn't actually win though, the Twin' Justin Morneau won.

NEW YORK (Reuters) - Texas Rangers slugger Josh Hamilton set an All-Star Game Home Run Derby record on Monday by belting 28 homers in the first round but the Minnesota Twins' Justin Morneau prevailed in the end to win the trophy.

 

Morneau claimed the title by hitting five homers against three from a spent Hamilton in the final round, where they started 0-0 with no carryover from the earlier rounds.

 

Hamilton was the star of the charity fund-raising show on the eve of Tuesday's All-Star Game with a jaw-dropping display of power that saw him clout 13 homers on 13 successive swings and measure more than 500 feet on three of his blasts.

.... 

 http://www.reuters.com/article/newsOne/idUSN1448200820080715