I would like to use a ln2br in a printf funtion ... is that possible ?

I have the following code :

printf ("<p>%s <br><br> %s<br></p>\n", $myrow["DATE"], $myrow["COMMENT"]);

Now I would like to use the ln2br() function on the $myrow["COMMENT"]

I've tried ln2br($myrow["COMMENT"]) ... but that doesn't seem to work ...

Can anyone help me out how I should do this ?