Britney Spears' youngest child with her ex-husband Kevin Federline turns 18, bringing an end to the hefty $5 million child support payments she has been making for the past 17 years.

The singer is reportedly planning a special gesture to celebrate her son's milestone birthday, one that will outshine anything Federline could afford.

Britney Spears is also said to be looking forward to mending her broken relationship with her children, who reportedly stopped replying to her texts because they were embarrassed by her social media posts.

The "Gimme More" singer can finally breathe a sigh of relief from the huge financial obligation as her youngest son, with ex-husband Kevin Federline, turns 18 on Thursday, September 12.

Spears had been paying child support to Federline for the care of their two children, Jayden and Sean Preston, for the past 17 years, which has reportedly accrued to a total of about $5 million.