[2] He made his Eredivisie debut for the club on 15 September 2007 against Ajax and scored his first league goal on 22 January 2008 against Excelsior Rotterdam.

[citation needed] After the end of his loan period with Heracles, Lakić returned to Hertha for pre-season training, but went on to sign a three-year contract with 2.

[3] He made his Kaiserslautern debut on 9 August 2008, scoring the team's only goal in their 2–1 defeat to Carl Zeiss Jena in the first round of the DFB-Pokal.

On 13 August 2010, he scored a last-minute equaliser against VfL Osnabrück in the first round of the cup competition, and went on to set up two goals for Erwin Hoffer in the ensuing extra-time period to secure his team a 3–2 win.

He went on to score another hat-trick in a 4–1 win at TuS Koblenz on 19 January 2011 in the round of 16, before the club were eliminated in the quarterfinals with a 2–0 defeat at MSV Duisburg a week later.

On 27 January 2011, it was made public that Lakić would move to VfL Wolfsburg on a Bosman-transfer at the end of the season, signing until 2015.

1899 Hoffenheim took Lakić on loan until the end of the 2011–12 season to fill the gap left by Vedad Ibišević departure for VfB Stuttgart.

[8] During the last few days of the open transfer window in January 2015, Lakić left Kaiserslautern to join relegation-threatened Bundesliga side SC Paderborn.

[12] On 2 November 2010, he was named to the squad for Croatia's UEFA Euro 2012 qualifier against Malta later that month, but did not feature in the match.